Crazy8's...a grundle is the area between the ball sack and ass crack. Its known for collecting sweat, foul odors, and acne...at least in my case. Anyways, I've been marinating my grundle, my sac, and my wiener for a few days now with the KY Jelly. They feel very tingly, I have had constant boners at the grocery store i work at. I have to apply more ky jelly every hour so sometimes i go to the bathroom, apply a large amount of the jelly and bag food for folks. Its been a unique experience. When customers and co workers ask me whats that poking through, all i say is "Knicks vs Celtics, Christmas day" with a big smile on my face.