diff --git a/CHANGELOG b/CHANGELOG
index 00021d4..7011b5e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,6 @@
 1.23
+* Add /autoreact command to automatically put reactions
+  to messages.
 
 1.22
 * Fetch only the list of joined channels if the full list
diff --git a/README.md b/README.md
index 2cdf613..62710b7 100644
--- a/README.md
+++ b/README.md
@@ -172,6 +172,9 @@ They are mapped as irc channels that get automatically joined when a message is
 Until a thread has some activity you can't write to it.
 They are only tested for channels, not private groups or chats.
 
+## Reacting to messages
+Since I don't feel like manually wasting time to do it, a very nice `/autoreact` command is available to automate reacting.
+
 ## Instructions for irssi
 
 If you need to refresh your memory about connecting in general, this is a good guide: https://pthree.org/2010/02/02/irssis-channel-network-server-and-connect-what-it-means/
diff --git a/irc.py b/irc.py
index 4099882..7bc0f19 100644
--- a/irc.py
+++ b/irc.py
@@ -172,6 +172,10 @@ async def _userhandler(self, cmd: bytes) -> None:
         await self._sendreply(2, 'Your nickname must be: %s' % self.sl_client.login_info.self.name)
         await self._sendreply(2, f'Version: {VERSION}')
         await self._sendreply(Replies.RPL_LUSERCLIENT, 'There are 1 users and 0 services on 1 server')
+        await self._sendreply(2, '============= Extra IRC commands supported =============')
+        await self._sendreply(2, '/annoy')
+        await self._sendreply(2, '/autoreact')
+        await self._sendreply(2, '/sendfile')
 
         if self.settings.autojoin and not self.settings.nouserlist:
             # We're about to load many users for each chan; instead of requesting each
@@ -326,6 +330,33 @@ async def _modehandler(self, cmd: bytes) -> None:
         params = cmd.split(b' ', 2)
         await self._sendreply(Replies.RPL_CHANNELMODEIS, '', [params[1], '+'])
 
+    async def _autoreacthandler(self, cmd: bytes) -> None:
+        params = cmd.split(b' ')
+        params.pop(0)
+
+        try:
+            username = params.pop(0).decode('utf8')
+            probability = float(params.pop(0))
+
+            if params:
+                reaction = msgparsing.get_emoji_code(params.pop(0).decode('utf8'))
+            else:
+                reaction = 'thumbsup'
+
+            if params:
+                duration = int(params.pop(0))
+            else:
+                duration = 10
+
+            # async def add_autoreact(self, username: str, reaction: str, probability: float, expiration: int) -> None:
+            await self.sl_client.add_autoreact(username, reaction, probability, time.time() + duration * 60 )
+        except Exception as e:
+            await self._sendreply(Replies.ERR_UNKNOWNCOMMAND, 'Syntax: /autoreact user probability [reaction] [duration]')
+            await self._sendreply(Replies.ERR_UNKNOWNCOMMAND, f'error: {e}')
+            return
+        await self._sendreply(0, f'Will react to {username} for {duration} minutes')
+
+
     async def _annoyhandler(self, cmd: bytes) -> None:
         params = cmd.split(b' ')
         params.pop(0)
@@ -683,7 +714,8 @@ async def _messageedit(self, sl_ev: slack.MessageEdit) -> None:
             text=seddiff(sl_ev.previous.text, sl_ev.current.text),
             channel=sl_ev.channel,
             user=sl_ev.previous.user,
-            thread_ts=sl_ev.previous.thread_ts
+            thread_ts=sl_ev.previous.thread_ts,
+            ts=sl_ev.previous.ts,
         )
 
         await self._message(diffmsg)
@@ -841,6 +873,7 @@ async def command(self, cmd: bytes) -> None:
             b'INVITE': self._invitehandler,
             b'SENDFILE': self._sendfilehandler,
             b'ANNOY': self._annoyhandler,
+            b'AUTOREACT': self._autoreacthandler,
             b'QUIT': self._quithandler,
             #CAP LS
             b'USERHOST': self._userhosthandler,
diff --git a/man/localslackirc.1 b/man/localslackirc.1
index 56b290b..b5fd1f2 100644
--- a/man/localslackirc.1
+++ b/man/localslackirc.1
@@ -191,6 +191,18 @@ This means that whenever a typing event is received from that user, on any chann
 .br
 duration is the duration of the annoyance in minutes. It defaults to 10.
 .SS
+.TP
+.B /autoreact user probability [reaction] [duration]
+To automate reacting to messages, this nice feature is available.
+.br
+user is the username of the user that we want to react to.
+.br
+probability is a number between 0 and 1, to decide how much to react.
+.br
+reaction is the reaction to use. The default is "thumbsup".
+.br
+duration indicates when to stop doing it, in minutes. Defaults to 10.
+.SS
 
 .SH "SEE ALSO"
 .BR lsi-send (1), lsi-write (1)
diff --git a/msgparsing.py b/msgparsing.py
index a1e0234..aeb4297 100644
--- a/msgparsing.py
+++ b/msgparsing.py
@@ -20,10 +20,12 @@
 from typing import Iterable, NamedTuple, Optional
 
 try:
-    from emoji import emojize  # type: ignore
+    from emoji import emojize, demojize # type: ignore
 except ModuleNotFoundError:
     def emojize(string:str, *args, **kwargs) -> str:  # type: ignore
         return string
+    def demojize(string, str, delimiters: tuple[str, str]) -> str:  # type: ignore
+        return string
 
 
 SLACK_SUBSTITUTIONS = [
@@ -38,9 +40,17 @@ def emojize(string:str, *args, **kwargs) -> str:  # type: ignore
     'Itemkind',
     'PreBlock',
     'SpecialItem',
+    'get_emoji_code',
 ]
 
 
+def get_emoji_code(msg: str) -> str:
+    '''
+    Pass a single emoji and get the code without delimiters.
+    '''
+    return demojize(msg, ('', ''))
+
+
 def preblocks(msg: str) -> Iterable[tuple[str, bool]]:
     """
     Iterates the preformatted and normal text blocks
diff --git a/slack.py b/slack.py
index 444e5fd..d1026b5 100644
--- a/slack.py
+++ b/slack.py
@@ -143,6 +143,7 @@ class Message:
     channel: str  # The channel id
     user: str  # The user id
     text: str
+    ts: float
     thread_ts: Optional[str] = None
     files: list[File] = field(default_factory=list)
 
@@ -150,6 +151,7 @@ class Message:
 class NoChanMessage(NamedTuple):
     user: str
     text: str
+    ts: float
     thread_ts: Optional[str] = None
 
 
@@ -338,6 +340,22 @@ class SlackStatus:
     """
     last_timestamp: float = 0.0
 
+
+class Autoreaction(NamedTuple):
+    user_id: str
+    reaction: str
+    probability: float
+    expiration: float
+
+    @property
+    def expired(self) -> bool:
+        return time() > self.expiration
+
+    def random_reaction(self) -> bool:
+        import random
+        return random.random() < self.probability
+
+
 class Slack:
     def __init__(self, token: str, cookie: Optional[str], previous_status: Optional[bytes]) -> None:
         """
@@ -362,6 +380,7 @@ def __init__(self, token: str, cookie: Optional[str], previous_status: Optional[
         self._wsblock: int = 0 # Semaphore to block the socket and avoid events being received before their API call ended.
         self.login_info: Optional[LoginInfo] = None
         self.loader = dataloader.Loader()
+        self._autoreactions: list[Autoreaction] = []
 
         if previous_status is None:
             self._status = SlackStatus()
@@ -484,6 +503,7 @@ async def _history(self) -> None:
                             user=msg.user,
                             thread_ts=msg.thread_ts,
                             files=msg.files,
+                            ts=msg.ts,
                         ))
                     elif isinstance(msg, HistoryBotMessage):
                         self._internalevents.append(MessageBot(
@@ -532,6 +552,53 @@ async def typing(self, channel: Channel|str) -> None:
             ch_id = channel
         await self.client.wspacket(type='typing', channel=ch_id)
 
+    async def add_reaction(self, msg: Message, reaction: str) -> None:
+        r = await self.client.api_call(
+            'reactions.add',
+            channel=msg.channel,
+            timestamp=msg.ts,
+            name=reaction,
+        )
+        response = self.tload(r, Response)
+        if not response.ok:
+            raise ResponseException(response.error)
+
+    async def add_autoreact(self, username: str, reaction: str, probability: float, expiration: float) -> None:
+
+        if probability > 1 or probability < 0:
+            raise ValueError(f'Probability must be comprised between 0 and 1')
+        user_id = (await self.get_user_by_name(username)).id
+
+        a = Autoreaction(
+            user_id=user_id,
+            reaction=reaction,
+            probability=probability,
+            expiration=expiration,
+        )
+
+        if a.expired:
+            raise ValueError('Expired')
+
+        self._autoreactions.append(a)
+
+    async def _autoreact(self, msg: Message) -> None:
+        for i in self._autoreactions:
+            # Clean up
+            if i.expired:
+                self._autoreactions.remove(i)
+                return
+
+            if i.user_id != msg.user:
+                continue
+
+            if i.random_reaction():
+                try:
+                    await self.add_reaction(msg, i.reaction)
+                except:
+                    # Remove reactions that fail
+                    self._autoreactions.remove(i)
+                    return
+
     async def topic(self, channel: Channel, topic: str) -> None:
         r = await self.client.api_call('conversations.setTopic', channel=channel.id, topic=topic)
         response: Response = self.tload(r, Response)
@@ -914,10 +981,6 @@ async def event(self) -> Optional[SlackEvent]:
             if ts > self._status.last_timestamp:
                 self._status.last_timestamp = ts
 
-            if ts in self._sent_by_self:
-                self._sent_by_self.remove(ts)
-                continue
-
             if t in USELESS_EVENTS:
                 continue
 
@@ -951,7 +1014,14 @@ async def event(self) -> Optional[SlackEvent]:
                     # the other user, and prepend them with "I say: "
                     im = await self.get_im(msg.channel)
                     if im and im.user != msg.user:
-                        msg = Message(user=im.user, text='I say: ' + msg.text, channel=im.id, thread_ts=msg.thread_ts)
+                        msg = Message(user=im.user, text='I say: ' + msg.text, channel=im.id, thread_ts=msg.thread_ts, ts=msg.ts)
+
+                    await self._autoreact(msg)
+
+                    if ts in self._sent_by_self:
+                        self._sent_by_self.remove(ts)
+                        continue
+
                     if subt == 'me_message':
                         return ActionMessage(*msg)  # type: ignore
                     else: