I didnt read the entire thread but when I was 31, I started dating a guy who was 19. (lol shut up). I think it all depends on the individual, not just their age. We dated for over 2 years and it was pretty good overall - with both of us knowing that we werent looking for anything like marriage/co-habitating/etc. it was pretty casual and relaxed, but still exclusive. anywho, eventually when the newness wears off, there will likely be issues that come up as a result of age difference