>>29530157It's fantasy wish fulfillment. I really hate explaining fetishes, since most fetishes are unexplainable anyway, but most dudes when they're young are super horny, and would have loved nothing more than to fuck some of the hot older women they see. It's a trend that continues on no matter how old you get. You still see yourself as the young'in banging the milf
There are other aspects to it to, like the idea that most older women are a lot more nurturing and motherly