[drivebycoder]

I'm just going to go with a pretty basic response.

I'm a big fan of reciprocation, if I kiss someone, I expect to get the feeling that they are kissing me back. If I go down on a girl, I would expect some kind of sexual equivelancy, either a blowjob, rimjob, or some other kind of foreplay to get the mood flowing and make sure that both of us are there for the same reason.

Of course, on the other hand, I also understand that it is fun sometimes to just do things for the randomness factor, such as a gloryhole. So it is understandable under the right circumstances to not expect anything in return for a sexual act.

Perhaps out in the open room, a woman is holding a sign that reads "Come have a taste of my warm apple pie", and being friendly, she is letting anyone who is interested come up and taste her apple pie...

A lot of expectation comes from the setting, but i usually prefer an even exchange when in bed with someone.