I think most men love to exhibit his girlfriend, fiancée or wife.
I love it when my sweetheart wears a low-cut bodice - no bra, I love it even more when a stranger looks under her skirt when she's not wearing panties!
Then bend over in front of or several strangers deep or spread your legs a bit ... That makes me horny and she wet, too!
Below is an example of where a stranger could just look at the nipple! Not much, at that time an A-cup, but still firm today, she really does not need a bra. Today she need a B - cup.