Use reinforcements like treats, scratching the back, saying good dog
I think the answer you're looking for is Lube.
Mostly because frozen yogurt leaves a slime residual ingredients on its smallest parts and it could go rotten if left inside.
A. Hand signals help car and truck drivers anticipate your movements
I could recommend Brian find someone he feels comfortable talking to about his feelings example another trusted friend or a professional. Or find close relative to have family members speak to him