[05:51] xxx: right now I'm having a discussion about sex, actually.


For me the placement of the coma and having the word "actually" seems quite abrubt. This sentence does nothing to open up a conversation.

If the sentence appeared like this.

[05:51] xxx: actually right now I'm having a discussion about sex.

That for me would seem like an invitation to continue the discussion.


[05:52] zzz: ok ill let u go

I think that this is good manners, if someone has stated that they are already engaged in a conversation, I would not want to intrude.