Quite simply because the legal age of consent is 18. Now, don't get me wrong, I'm not going to sit here and say that all boys and girls are ready to make that choice at 18, I'd be more than happy for there to be a 'Age of Consent" test to take before you were allowed to get married, vote, drink, etc.. Unfortunately I don't see that happening anytime soon, besides the new problems that would cause, classifying people for how they scored on "The Test"ResearchMonkey said:
Why do you feel two men can marry but 43 year old man and a 15 boy can’t get married? Because he is not 18? Why the arbitrary age of 18? Men are not mentally mature at 18.