Puns Will Be Assimilated

(My mom has brought her sewing machine out to repair some clothes. My brother is getting into learning how things work.)

Brother: “How does the sewing machine pedal work?”

Me: “It has a potentiometer in it. It adjusts resistance to change the flow of electricity.”

Brother: “Resistance?”

Me: “Yeah. It’s futile.”

Mom: “No, it’s foot-ile!”