1. place your partner on their shoulders, preferably with some sort of back support. your partner's ass should be in the
air.
2. straddle your partner's ass and shove your balls - ONLY your balls - into your parnter's asshole. (this
may be painful on the balls, depending on the elasticity of the currently penetrated asshole)
3. with an
erection, and while your balls remain in your parnter's asshole, slowly rotate around your partner making cannon noises, much like a the turret of a
tank. Onomatopoetic words, such as "boom" and "chk-burrgh* are appropriate.