I annoy people at work by avoiding talking about sex.Watch
I will then change the topic subtly to politics (which I really like talking about) and stuff like current affairs.
It makes my co-workers quite angry, I think.
If you don't want to talk about it you shouldn't have to.
I get quite annoyed when people talk about politics as well, there is a time and a place and imo work is neither of those. Why not try talking about something a bit more pleasant.