What do 15/16/teenage year old guys expect girls to have down there?
Well speaking as an ex 15-16 year old boy I know that most guys that age watch porn. So they expect it to be something like that. Trimmed, shawed or something like that. Unfortunately I have to say, since sex isn’t like it is on porn. I would recommend talking to him about it so that he knows how things work. Explain to him that this is in his best interest as well. So that he can learn about girls. Good luck!