Once my ex girlfriend and I were having sex.. She was wild that day.. Like a lot.. Anyway she rode me pretty hard hurting my balls when they would slap on her ass.. Then she sucked waaay to hard on one of my balls and it swelled up so bad I couldn't stand up without feeling I got kicked in the balls... Words of advice ladies: don't suck and pull as hard as you can when you're turned on, our balls are still balls