After throwing out my sex tip of the day - (the short version) breasts should not be a man's main target with foreplay. Women get bored with this REAL quick. Give 'em a pat, and then move on! (Note: I'd say man or woman's main target, but I know women know better.)
The men's reaction:
Guy #1: That wasn't a very good tip!
Guy #2: Yeah, I've never had sex and I knew that!
Guy #3: It is rather obvious.
The women's reaction:
Girl #1: YES. Thank you!
Girl #2: Ugh, yes. BORING. Even when you tell them, they don't listen!
I rest my case.