How about only making children able to consent between each other?? That would...

...involve a "what are your labels" scenario, undoing the US constitution and all principles of international law created immediately after WWII.

I know that you'll disagree because I'm selfish and only care about what I want.

...namely your slavish adherence to Lord Hitler.

There's a charming Pink Floyd song about your obsession with caste and labels. And you get option 3.