I think it just depends, anyone going after a young child is wrong. In the adolescent department, I know a lot of teens start being sexually active around 12 although I know a few people who started at 10. In my opinion, a person who is a legal adult really has no business dating someone under 18, although I know a few 18 y/o's who dated 16 but that's just maybe a 2 year gap. However, I had a class with a 16 year old dating a 21 year old, and in my opinion, no adult or person over the age of 20 has any business being with a person under the age of 18. Sorry, it's just... there is so much emotional growing a teen does between hitting puberty and hitting 18 years and even from 18 to 20. When you're 20+ years you should be fishing in your age group or older, people you can do things with without worrying about going to jail and such. However, after adulthood I really don't think age is a big deal, mostly it just depends on the person. Although being 20 I wouldn't date anyone younger than 19, just personal preference really but I tend to look for people the same age as me or older but only by a few years. Not trying to date 10+ years outta my age for practical reasons.