Older women who dated older men when you were young: How do you look back on it now?

I've seen some questions asking about age gaps and the like, but I'm curious about the "long view perspective". Like, yeah, if you're twenty and dating a man a couple decades your senior you probably think it is A-OK then because, well, you're twenty.
But when you're forty and look back at your youth, how do you feel about those big age gap relationships in retrospect? Would you undo it if you could?


Source.