We’re in the living room. I’m on the computer. The husband is explaining something to the boy.
Husband: “Blah blah blah Tesla coil.”
Boy: “Oh, cool.”
Me: “Wait a minute, why are you guys talking about testicles?”
Boy: “No, Tesla coils.”
Me: “Huh, I thought you said testicles.”
Husband: “Well of course you did.”
(Image is from here.)