Why do women subject themselves to this?

I've had contact with a 40-something, somewhat heavyset woman through Adult Friend Finder who lives in metro Phoenix and offers to do various sexual favors for me.

Eh, I don't know about that. One, I think I can do better, as in, an aftermarket and healthier woman in her 30's.

Two, I have health, hygiene and disgust issues about women in their 40's who reveal a history of promiscuity. (According to Jonathan Haidt's research, I would probably score highly on the "purity/sanctity" scale characteristic of conservatives.)

Three, I got burned by She Who Must Not Be Named, who made a similar offer to me in 1994 when she went hunting for a cryonicist/Extropian man to marry. (And how has the marriage with your preferred man worked out for you now, honey?)

And four, I don't understand why women of any age offer themselves in this way to men. I find the whole phenomenon mysterious, and I suspect these women have ulterior motives.