Quote from Nick in Swuit
Kai: You want to hang out tonight and have ninja turtle sex? Nick: What's ninja turtle sex? Kai: Sex with backpacks on. Nick: Oh, sex with backpacks on! Yes, I would love to, but I can't. I got to do some work, or Schmidt will put me in the "Think Harder" box, which is basically just a refrigerator box that he hits with a baseball bat. Gets me to think harder.