Geezer pleaser?
Or is that just for aficionados of older men
I suggest cougee.
Wouldn’t he be a gay dude looking to bang a guy whose mom is a whore? Kind of specific.
This. It doesn’t matter whether the older woman actually has kids.
Cub is usually a term that is used from the cougar’s perspective as I understand it. I don’t think a guy who is into older women would refer to himself as a cub.
Antique collector.
A man.
Some (most?) people think that a guy who likes younger women is a stud, but vice versa is a pervert.
I’m going to be high brow literary and go with Franklin
This.
We’re not picky. 
I KNEW this is where you were headed! 
.
Mmm no, not so much. Cub is a gay sex term.
Where I live they’re called cubs, but it doesn’t seem to be as well-established a term as MILF or cougar.
It’s a very well-established term. It just doesn’t mean what you think it means (see post above).
Good thing words never have two meanings, right?
Thing is, when they have a very specific sexual connotation (especially when the far more commonly accepted meaning is a homosexual one) most people don’t want to leave any room for confusion. If you look at the ratings on UD, the gay definition has 432 thumbs up and 129 down, while the “young man who likes older women” definition has 8 thumbs up and 17 down. Not popular.
So you don’t read through the examples, or you misunderstand the point of the site.
Wrinkle chasers.
In Japan, they are called swallows. I’m not sure of the nuances or whether it is in common use now.
could be a “grand” mother fucker
A toyboy.
Brave.
I’ve heard and second “boy toys,” although more precisely it suggests the male equivalent of “arm candy.”