Question about Dating Younger

I’ve noticed that men a lot younger than myself, flirt and want to date me, but I feel uncomfortable doing that. When I was in my 40s it was 20 somethings and now I’m in my late 50s and it’s late 30 year olds. Part of me likes the idea but then there’s the part that feels like there’s something wrong with dating someone 20 years younger than you. Am I wrong in thinking this way. I know it’s commonly accepted that men date younger women. So why not the other way?