Are your balls churning from the rocking and the cum starting to build up in them. Lets see what the burn is all about. Untie your balls and take a condom and put some of your hot stuff in it. Don't be wimpy. Now put two ice cubes in it. Stretch it out and push your balls into the condom. Tight fit? Wait til your balls get nice and swollen and it will be a tight fit them. I think I will lay back and relax a little as you get yourself nice and ready to heat up your balls. Don't you wish you could be standing over me sliding your cock in and out of my mouth. Isn't this a perfect position for that? Don't get your hopes up the chances of that happening are.... NIL!