Dirty talk over aim or through texting?

Okay so me and this guy from collage have been talking for a couple of months, we knew each other a little bit from school, but now that he moved t a different part of the state we have become really close, and while talking to him on aim and texting, I...

really want to start talking dirty to me, he always tries to, but I quickly change the subject because I don't know what to say. Examples anyone? Please help.
We've never done anything with each other, but we get on webcam and so on. I just would really like to send him dirty things, to drive him crazy
All I need are examplesss

Usually if you tell guys what you 'want' to do to them, it drives them wild. But I don't know why you'd do this to someone you aren't serious with. Oh well, your business.