Slightly offensive - mothers look away now...

[East Coast Dave]

Johnny is 15 years old.
One Saturday afternoon he walks into his parents bedroom to find his dad playing hide the sausage with his mum.
His dad spots him at the door, laughs and throws a pillow at Johnny.
Johnny leaves.

Later that afternoon dad is on the landing & he hears noises from Johnny's room.
He walks in to find Johnny going at it with grandma.

Johnny spots him at the door & yells:

"It's not so funny when it's your mum, is it?"

[912uk]