I would think a person (regardless of gender) would be respectful enough not to stare and ogle at a woman’s cleavage. Some women prefer to show theirs because it feels good to them, and it has nothing to do with wanting attention. It’s understandable, though, to glance at cleavage – because let’s face it, breasts are attractive and they attract!
Men, how would you feel if someone (regardless of gender) stared and ogled at your groin? Some men wear tight pants or uniquely shaped underwear, accentuating their “package.” Some men are just built to protrude, and it’s simply not their fault for having a defined “package.” Should people (regardless of gender) stare, too? After all, some say it’s only hormones that causes men to stare at cleavage – we are, after all, only animal human.