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Newton's Cradle

2 guys, 1 chick in the middle. One guy puts his balls next to her left ear, and the other on the opposite ear. The two guys rock, paper, scissors on who goes first. The guy who goes first lets his balls hang then lets go, hitting the chicks ear. Then the energy is transferred due to elastic collision.
Bruh, me and my homeboy Tony fucked this chic. We did the Newton's cradle and she ended up with a concussions.
Newton's Cradle by papabenny February 28, 2018

Newton's Cradle

The action of 2 men standing next to one another and swinging their balls in such a way that they swing back and forth due to the horizontal force of each set of balls making direct contact
"I want to Newton's Cradle with you"
Newton's Cradle by bobrob1234 November 3, 2021

Newton's Cradle

When your penis is too short to successfully dock, so you end up clinking your testicles together, like the classic toy, Newton's Cradle.
Bro I thought we were going to dock eachother but we just ended up doing the Newton's Cradle
Newton's Cradle by gog1414 January 2, 2024

[Newton's Cradle] 

When in an act of a 3-some involved with a female and two males and one penis is in the ass and one penis is in the vagina and their balls are alternating turns clanking together with their momentum.

hip thrust x ball mass = good times squared
My balls created some sick momentum at the Newton's Cradle party last night but now my balls are sore. Are yours?

Newton’s cradle 

A game where 5 or 6 men line up and slap balls together like newton cradle balls until everyone except one has left the game
Hey guys you up for a game of Newton’s cradle?
Newton’s cradle by N22rush October 4, 2018

Newton’s Cradle 

The equivalent of a motorboat for guys. When a woman motorboats a mans balls vigorously. Often s
Dude, Jess gave me a mean Newton’s cradle the other night, my nuts haven’t been the same since.