Why can't older people like younger people?

Me as a 17 year old can say that I like a 25 year old. But it suddenly becomes bad when a 25 year old says that they like a 17 year old. Why is this?

*sigh*

Because you are a child.

@bruxae: Are you being ageist?

@bruxae: How is 17 a child?

You can like whoever you want but if they're underage you need to leave them be.

Didn't you ask this before?

http://www.comicvine.com/forums/off-topic-5/why-are-age-differences-creepy-1598721/