I don't think I get it...
"Hey man, look at those....shoes?"
"The contrast of that blue denim shirt and grey sweatshirt is so trendy...not to mention those shoes are eye-catching..."
I don't even know where to look, not up or down
One pair for the ladies
1. Hiding a second passenger in an airplane and avoiding extra ticket fees
2. Pants/backpack=buttpack; Ladies= buttpurse
3. Can't think of anymore so I'll have to go with the most obvious: concealing adult diapers.