my theory with dating someone soo much younger than you (when you are between the ages of 18-25) is that you have low self esteem when it comes to girls/guys so you go for the younger ones (who would automatically think its 'really cool' dating an older person). this may not be the case in all scenarios, but it is what i beleive. a 24 year old guy that is always dating 18 year olds screams out 'loser' to me cuz he can't get anybody his own age.

for me, being 21, i wouldn't date someone younger than 20. but in terms of how old, i'd say maybe my cut off limit for actually dating a guy is 30. however i have been know to fall for guys around 30-35 (back when i was 18 and 19). so yeah that's my story/view.