The politically incorrect parts probably have to do with the fact that a woman in high heels is showing her availability for sex in two ways: first, her pelvis is tilted to receive rear-entry and second, she is clearly unable to run away. Or so I imagine. Though high heels are also excellent weapons of self-defense, especially if used against the eyes of the attacker. Just kidding, just kidding! Don't quote me on any of this and don't try any of this at home.
Whoops! Sorry, E, too late now.
Heels are also terrible for your feet, knees, legs, and back. One of my grandmothers worked as a cocktail waitress for many years, wearing high heels for 40 hours a week. She's had foot surgery at least half a dozen times, probably closer to a dozen times, and, while she can still walk and go up and down stairs, she's considered legally handicapped, with wheelchairs at the airport and a parking placard.
Oh, and another story, this one about one of my step-sisters. A couple years back, Rachel begged and begged for a particular pair of high heels for months. Finally her mom relented. Rach will wear them for 5-10 minutes at a time, then have to take them off or sit down because they're so uncomfortable.
"But they're fun!" "But they're cute!" "But they're sexy!" Uhhh, yeah, fine whatever.