Their P is silent.
You're a little rougher than I'm used to, but I'll grit and bear it. I'm sorry, that joke was a little rough ;D
The type of gas used.
He was just minding his Ps and Qs.
birdy :P
Because they p-irate.
Because they can't even.
Because the 'p' is silent.
Because pterodactyls are extinct.