Going to sit down in a wooden chair and sitting on your testicles.
My Doctor said I need to stop sitting on my balls. He thinks I'm purposely giving myself The Malectric Chair
The embarrassing(and sometimes painful) act of your balls hitting against your thigh or leg while walking or running
Me: Dude, I was running my 5k when my balls started hurting
Friend: Sounds like The Flop-Flop