i dont think its that important to stick to any specific age, because individual cases vary a lot

but, as a 21 year old....i'm not about to start robbing the cradle, even if the guy seems perfect...so any younger than 18...is too young, and 18/19, thats really young....you mature a lot in those years.

As for the perfect age, to me...its always been guys two years older than me. So, are ya 23 and single ;-) haha, j/k