Any other men stretch their balls (or had them stretched by another)? Either as a one-time thing, or an on-going kink?
I started young, with one of the leather parachute devices, and worked my way up to heavier and heavier weights and various other devices.
Got my balls long enough that I can tuck them into my ass... an awesome experience... or wrap them around my penis and insert the whole package into my partner (female... male might be a little too tight) during sex.