"Seems happy," I agree. He may very well be happy until he reaches late adolescence and decides, "I don't want to play this game anymore," or "this doesn't feel right anymore," but it would be too late to naturally and normally go back to living as a biological male if he has been abused with puberty blocking hormonal treatments or invasive surgery at a young age. Pro "trans" pediatricians say that that type of "affirmation" is child abuse. Read the short paper from above. I can't post a link, imgflip won't let me for some reason.