I say no, youth love should not be encouraged, nor should it be done. I believe this due to both my religous and personal convictions, as it can cause unwanted pregnancies, STDs, and can destroy not only lives, but entire families as well.
But sure, if they want to have a child/love and are married & responsible enough, it would make sense though.
If you're horny to the point where it is unbearable, just masturbate, lol.