It's like penisex except tighter.
You wanna have some penisex?

Nah I'm in the mood for something tighter. How bout ballsex?

I'm in!
by Thatballsexguy August 29, 2009
1. a male inserting his testicles into a vagina, anus, or other orifice commonly used for sexual stimulation

2. similar to tit-fucking, wrapping the testicles around the shaft of your partner's penis, or your own, and simulating sex.
My genital herpes were acting up last night, so my girl and I had ball sex instead.
by HankMoody( *)(* ) February 12, 2012

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