>why is it so common for women to take nude selfies and have videos
Women have been selected by evolution to be the ones who attract mates primarily through secondary sexual characteristics. This is why female bodies seem tailor made to attract men.... because they ARE tailor made to attract men.
Think about it for a moment. Virtually every other primate species have nipples in the same place that human women do, and they all produce milk like human women do.... but none of them have tits. Why is this? Simple, because humans are far more likely to copulate while facing one another, while animals are more likely to do it "doggy-style." This means that women, quite literally, through mate selection alone, grew faux-butts on their chests to attract males and their differing tastes when it comes to fucking.
That is what tits literally are.... a chest-butt. Not even kidding:
>livescience.com/32745-why-do-women-have-breasts.html
>theguardian.com/science/2010/may/14/breast-size-evolution
This is why they display themselves, not only are they programmed to (to attract mates), you are programmed to love it.
Enjoy your chest-butts.
>Leonard Shlain, a surgeon and author of "Sex, Time and Power: How Women's Sexuality Shaped Human Evolution,"(Viking, 2003), suggests that women's breasts grew round after our early ancestors stood upright.
>In this view, the breasts of the female ancestors of humans evolved over time, along with a gradual tilting of the pelvis, so that the vagina was more oriented to the front of the body. Together, these transformations encouraged face-to-face sex, and marked a departure from the position most commonly used by other apes, in which the male approaches the female from behind.
>Ethologist Desmond Morris has also proposed this theory, and has suggested breasts are substitutes for the round, red buttocks of our female ape ancestors .