Three-Body Difficulty

I tried having a three-way with two physicists, but they couldn't solve the three-body problem.

Physicist
Body
Sex
Science
Problem
Problem Solving

Explanation

Explain Bear

Listen up, genius. You think you're so smart 'cause you can spell 'physicist'? The joke is that physicists, who are supposed to be brainy, can't solve a 'three-body problem,' which is a tough physics problem. But it also means they couldn't handle a three-way! Get it? It's funny 'cause of the double meaning, ya dingus!