PUAs, can you explain this?

I am a bisexual woman but I cannot understand this thing: I see more and more pretty and charming girls in their 20s and their early 30s being attracted to men who are far older than them, like in their 50s. Why? Not in all the cases I have seen the men are particularly wealthy or successful: quite the contrary, that seems to be a low percentage! I think it is more about finding a father- like figure. Can you explain this, please?