Hair that looks like it's been naturally sun-bleached makes you seem youthful, like you spend a lot of time outdoors. And that appeals to most people.
Mothers really were not built to raise babies not only by themselves, but with only a partner. For millions of years, a woman had much more than just her husband to help rear her young... This whole idea of 'it takes a village to raise a child' is exactly how we're supposed to live.
Overdone lipstick is a deterrent to men. It rubs off easily onto their skin and the edges of their shirts, so it discourages them from kissing, touching, and coming closer to you, which is what they really want to do!
For men, being too put-together implies femininity.
Once you fall for someone, their smell can be a powerful thing. Women will wear their boyfriends' T-shirts, and throughout tales in history men have held on to their lover's handkerchief.
Women are naturally prone to compete over their mates.
Women, it turns out, are built to lead - particularly in the modern world.
When you fight, anger drives up testosterone in both men and women.
My hypothesis is that conservative Republicans have very clear values, and when you have that, you're simply more relaxed.
Women apparently are quite drawn to men who have differences rather than similarities in their histocompatibility system. They pick it up by smell, and they can pick it up from kissing.
If we remained perpetually infatuated, we couldn't eat, sleep or work.