Yeah I agree that there are 20 yr olds who are more mature than some in their 40s. Perhaps on the face of it, it could work between people so different in age.
But what a thing to do to someone so young- 'Is that your Dad, or Grandpa?' when you go out together. Imagine meeting each other's family & finding you're older than her father?? Will you ever have friends in common?
One day one of you will be 70 & a danger on the roads, while the other will be 40 or 50, still living life to the full.
I said to my girl right at the start, that I want to be 'part of your life, not your whole life' I said it could never work if we were together in person due to our age difference.
It might sound great to her- but I'm pushing 50 & she's in her early twenties. She ultimately needs someone her own age.
There are exceptions, but in general terms, a man on the wrong side of 40 needs to be very damn careful what he says to a 20 y/o.
Ask yourself if you really care- if you're a real Dom, you will love & cherish any girl you talk to- & not just for a few weeks....