Little Johnny, daddy, and the rat

Little Johnny walked into his dad's bedroom one day only to catch him sitting on the side of his bed sliding a condom onto his penis in preparation for sex with his wife. Johnny's father, in attempt to hide his full erection with a condom on it, bent over as if to look under the bed.

Little Johnny asked curiously "What ya doin dad?"

His father quickly replied, "I thought I saw a rat go underneath the bed."

To which Little Johnny replied "What ya gonna do, fuck him?"