I Like When My Balls Are In Pain

At home feeling a little horny, I am wearing red high heels with peep toe (I painted my toe nails a sexy red), tan thigh high pantyhose, and a red dress. Lifting up the front of my dress, I start jerking my hard cock. My other hand plays with my balls that are tied up very tight with a cockring wrapped twice around. Because I enjoy and am turned on when my balls are in pain, I slap and squeeze my balls. Usually for hours, till I cum. I want suggestions of what to do to my balls to make them hurt.