The asphalt.
Son: I don't know they haven't taught us how to read yet!
You're too young to smoke. Sorry, it's the first joke I ever learned, and I haven't ever seen it posted.
The bike doesn't start singing when you put a chain on it.
Lets go play on our bikes.
You need to cul de sac.
Cleopatra.
I prefer to ride on top but it's very hard getting the horse up the stairs.
Robert E Flea !
Hiding the erection.
fitting the wheelchair in the microwave.