Because their p is quiet.
Doctor responds: "Heavy drug use, ma'am" Widow: "But doctor, my husband didn't use drugs!" Doctor: "I know, but I did"
Because they're not used to getting Snowden. (I'll see myself out)
Skip to my loo.
I need to do a vowel movement!
One had to P.
All P
Their P is silent.
Because the 'p' is silent.