Newton’s Cradle

A modified spit roast. One guy’s dick in the girl’s mouth, the other guy’s dick in her pussy/ass. When one guy thrusts in, the other pulls out, and vice versa, so it looks like a Newton’s Cradle.

“Man, Sally’s such a slut.”
“Yeah, she let Tom and I give her a Newton’s Cradle last night.”

by AncientPig June 9, 2021

Newtons Cradle

The action of testicles making contact during during a BGB threesome, where B1 enters G vaginally, and B2 enters G rectally.

So me and my boy had a threesome with this chick, everything was good until we had a newtons cradle happen.

by Dodo, The Dodo November 23, 2025