jokes

My mum and my grandma are terrible at telling jokes.
Grandma: *tells 12-inch-pianist joke*
Grandma: *stuffs up 12-inch-pianist joke*
Me: That's fantastic, except you told it wrong.
Grandma: No I didn't.
Me: Well, what's supposed to happen is *tells 12-inch-pianst joke correctly*
Grandma: Alright fine.
Me: Seriously, how do you stuff up the 12-inch-pianist joke? It takes skill to stuff up the 12-inch-pianist joke.
Mum: Right, so there's this bloke who goes into this pub and he's got an ENORMOUS PENIS.
Me: *laughs tea through nose*