All i know is that I'm very glad I dated a 45 year old when I was 20. My parents didn't approve and I moved in with him when I turned 22, out of state, since I met him online. He's not perfect, but he is perfect for me. Age is just a number, what really matters is how mature you want to be. How much hard work you're willing to put into your life and someone else's life. We have an age difference. So what, we have a hair difference and a height difference and a gender difference as well. Just differences. But I couldn't imagine my life without him. He does not have a fatherly role. It is not weird like that. He is a person, who happens to be 50. He's my best friend. So Yeah, I think it's ok for a 20 year old woman to date a 45 year old man, because it was ok for me. Is it even ok for some 20 year old women to date other 20 year old men? Sometimes that's not even healthy because the woman or the man might be abusive. So age is just a difference and not a really good indicator of compatibility.