For the times where your man says touch it just once just the tip we have for you the cupping method
Simply cup your hand, placr it over his package and if youre feeling adventurous, hold a stern face and say "oh yeahh"
When someone grips a pistol (typically a magazine fed pistol) incorrectly by putting their non-dominant hand at the bottom of the pistol's grip, typically looks like your non-dominant is cupping a pair of testicles.
He's cupping the balls on that pistol, he has no idea how to hold it properly.