I've been having this problem with my girlfriend. Whenever we make out, I get the impression that she wants me to do something with her breasts... but I don't have the foggiest what to do.
I'm sure that they aren't there strictly for my enjoyment; so, what can I do with my girlfriend that would offer her some pleasure, as well?
I've tried other sources of information, but most other sources either concentrate solely on the vagina, g-spot, and clitoris, or they simply state that breasts are an erogenous zone and leave it at that.