xkcd got it right, imo.Tarrant220 said:depends on the age of the youngest involved.
The 6 year difference Brad speaks of isn"t a big deal if she"s 19.
However if the guy is 22 and the girl is 16 thats where the line gets drawn in my opinion.
Anything over that is fine in my eyes. (17 year old with a 23 year old and so on and so forth.)