Little Johnny walked into his Dad's bedroom one day only to catch him sitting on the side of the bed sliding a condom onto his penis in preparation of doing 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 doing Dad?'
His Father quickly replied, 'I thought I saw a rat go underneath the bed.'
Little Johnny replied, 'What ya gonna do, screw him?'