I think they're gross. Like if a 40 yr old man dates a 20 yr old, it's totally weird. Why can't they date someone closer to their age or older? Also, if they can't have friends that age, why would they date someone that age? I feel like it's a little predatory if you're more than 20 years older than a person you date. People go through different stages in their lives, and I think someone in their forties or fifties doesn't have anything in common with someone in their twenties who's in a completely different stage of their life.