alright, this is pretty hard to explain but i'll give it a shot. When I'm with my gf, and i get stimulated for awhile, i'll often get testicle pains(the tubes hurt slightly and the bag things on my nuts hurt a little bit more). The tubes that lead to my nuts enlarge a little bit, but they don't really hurt that much at all.
The pain usually goes away completely after like anywhere from 10-60mins. I do NOT get these pains any other time, even when i masturbate.
so, anyone got any idea what's up?