Historically, the legislatures have acted to establish minimum ages of consent to marriage. I do not believe 12 year olds should have the legal capacity to consent. If my state allowed 12 year old children to marry, I would work hard to elect legislators who would change the law.
Even at that, I am not aware of any state that has ever allowed a 12 year old boy to marry another male. Are you? Are you suggesting this should be allowed?
Apparently, BikerNYC would support it.