Impressed is a loose word.
I am a straight man but have to admit I will stare at both, and be impressed by both, and be turned on by both.
I'll enjoy both.
I don't know if I would say impressed with clevage but I would be enjoying it!
Id stare at both if they really stood out, but i wouldnt say id be impressed.
Men yes,,,C'mon. Women, hummmmmm...he he.