When I was the OP's daughter's age, it wouldn't even have occurred to me to find 50 year old men hot. Even a good looking 40 year old would be pushing it. And all my friends felt the same way. We fancied men our own age or maybe slightly older. The reality is that very few middle aged men are attractive to much younger women.
I don't actually disagree with this (there's probably a good reason a lot of the examples of hot men cited are famous actors!), and I didn't generally find much older men attractive as a younger woman (again, famous people crushes aside).
But it does happen. Relationships with big gaps are less usual, obviously, than those with smaller gaps, but they exist, and I find the vicious judgement on what grown adults chose to do or who they choose to have relationships with, quite disgusting.
Don't want to shag/be involved with a much younger/older person? Marvelous, you don't have to. But adults can make their choices.
And for the love of all that is holy I wish people would stop infantalising adults in their twenties.
Not having a go at you personally btw @@IcedPurple, I just quoted you as my own tastes and preferances are much like yours. But it's a big old world and people are very varied.