It is very hard not to at least glance in their direction for a moment while your brain initially takes them in.
It is perfectly possible to not stare at them like a slack-jawed yokel seeing New York for the first time on a constant basis. Exerting self-control is what civilisation and manners are all about.
Exactly so, just as it's instinctive for your mouth to water if a stranger is eating something that smells good, but not okay to grab the food off their plate, and instinctive to get angry when someone gets in your way, but not okay to punch them out.
Instinct is a poor excuse for boorish behavior.
BTW, tourists from New York can be equally slack-jawed when they see (e.g.) a real live cow for the first time. :-)
Because evolutionary sexual selection, as a process, has to start somewhere. No staring, no humanity as we know it. Lets all stare. Discreetly but not sheepishly.
On the one hand, what's wrong with staring as long as you're not creepy about it and stop it at staring?
On the other hand, as human beings with higher thinking capable of reasoning, you would assume that we can control our base urges and wouldn't use biology as an excuse.
