My wife (D cup) wore a cut off t shirt, no bra, playing pool once and guys could see her boobs from the bottom when she bent over to make a shot. It didn't dawn on her and I never told her.
I got a chick at my job built like her same personaltiy too... Im trying to get up in her, I got head already from her and played with the tits a few nights ago when I gave her a ride home...