questions to ponder

if our knees bent backwards, what would chairs look like?
if a cow laughs, does milk come out of her nose?
do sheep shrink in the rain?
if 7-11 is open 24 hours a day, 365 days a year, why are there locks on the doors?
why are they called apartments when they are stuck together?
do you need a silencer to shoot a mime?
what does geronimo yell when he jumps out of an airplane?
why is panties plural when bra is singular?
how does teflon stick to the pan?
why is there an expiration date on sour cream?
why isn't the word phonetic spelled the way it sounds?
why is abbrevation such a long word?

and my two favorite:
if a tree falls in the forest and no one is around, do the other trees make fun of that one tree?
why is there braille on the drive-up ATM?