It increases testes size so the scrotum skin would have to stretch a bit back accommodate this. So when you have an erection your scrotum feels really tight like you a web or turkey neck at the bottom of the penis pulling down. Your erections will be hard but not "locked out" pointing towards the ceiling. Thinking of dropping hcg for good. I just dont really feel any benefits from it anymore, besides the aesthetic appearance of having larger balls. Also not using hcg, varicocele goes away.