>>29265429a lot of it is prostitution and for porn, but its also a kink some girls have, basically the idea that they (young and hot) are having sex with old fat disgusting men is something that should not happen. Thats the appeal, that they are doing something that they shouldn't be doing, letting themselves be used by a crusty ogre.
It makes them feel dirty, and the more they play into it pleasing the ogre the dirtier and hornier they get