Why can't kids get married?
Kids cannot get married because they are minors in law and under the charge of their parent. Kids cannot also marry because marriage is not meant for kids and they cannot legally enter into contracts of any kind which is what marriage is.
Because they wouldn't know how hard it is if they tried.
Because their minors and its illegal
Because we're not mature enough. I'm glad we're not allowed to marry, we have too many hormones and stuff!