Why?

[hiker1992]

On occasion, if I masturbate too frequently (in a day) my testicles and penis tend to hurt. I can understand why my penis would hurt, given excessive rubbing of any body part can cause tenderness, but why would my testicles? Too much strain?

[shikachunin]

Its most likely because you masturbated too much. Its sorta the opposite of blue balls (Too much sperm). you've ran out, and your body needs to replenish the supply of sperm & semen. Just give it a day or two, and you can return to... uhh... what you were doing before. If it is still there after a while, you should see a doctor, or tell a parent/guardian

[Mzor203]

Well, because your testicles do the brunt of the work in ejaculating. They have to move all that semen out, so it would follow that doing it too much would put strain on them.

It won't hurt them too badly, but if you don't want the pain, then slow down a bit. :P

[hammertime3675309]

Maybe the balls bounced around to much. That happened to me before.

[EvilTwinXD]

it has never happened to me and i j/o 3 times a day mostly. when im done j/o i feel relaxed and a little tired.