In special experiment today I tied off his dick and balls with a thin string so hard that he won't be able to squirt any cum. I have tied him face down on the examination table and gagged him nicely. With my long leather gloves I pull his hard penis back and milk him. At about min 6 he comes but no drop comes out. It stays all in his restrained dick. This is fun. I just ignore his orgasm and continue to wank him and there is absolutely nothing he can do about it.