hmmmm

it's hard to hum the theme to metropolis.

beep

most people's debit card pin numbers, when entered, sound like shave and a haircut.

pocket

if you put a doggy poop bag in your pocket every time you go out to walk him and you don't take it back out if he doesn't use it because you're afraid one of these days you'll be caught without a poop bag, you will end up with a pocket full of poop bags.