I'm 20 and did a single test cycle. I can barley get a semi and not even slightly aroused, what makes you think someone 4 years younger in the most critcal parts of puberty's effects would be? I would do anything to go back and not have done it. It may be too late for me but not you. You have one life no gains in the world will be worth what will happen to you based on those compounds. I know its hard I was just 16 not too long ago but ur an idiot, just try to accept this fact because you'll realize in a few years how stupid u were anyways. Just don't do iy