Train your testicles
Testicles are not muscles tho
>>77250356Yours aren't
There's no way to attach weights to those parts aside from tying a rope around them. You're not making gains, just cutting off blood circulation with increasing aggression.
>>77250372
I need to stretch my right nut down so that it doesn't retract up into my groin whenever I'm going at it.
that's what I say when I'm teabagging your mother