SOOOOOO, you cannot drink legally until you are 21, you cannot vote legally until you are 18, in many states you cannot drive legally until you are 16, but you CAN go get a condom from a school, encouraging sex and possible teenage pregnancies and subsequent teenage abortions at the age of 12!!! That makes sense! You know, come to think about it, we legislate everything else, why not just make it illegal to have sex until you are 16 or 18?
I know you omitted your ‘/sarcasm’ tag, but “statutory rape” is sex with a minor (under the age of consent) - and yes it is a law in every state (although the age can vary by a year or two)