Paddle Wheel
When a guy goes off to jerk off and his best friend sneaks behind him and does all the arm work like he’s a silent partner in a very dirty business.
My dad went to the bathroom to paddle wheel. My uncle followed him and did all the arm work. My dad didn’t even notice.
At the mall, my friend went to the food court to paddle wheel. His friend snuck in and did the arm work like he was paid.
My brother went to the park to paddle wheel. His friend came in and did the arm work. It was like a two-man show.