A guy goes into Victoria's Secret and tells the sale's girl he wants to buy his wife a nice bra. The sale's girl asks him what size bra his wife wears. He said he didn't know but would find out and return. He did return and this time when the sale's girl asked him what bra size bra his wife wears he says:
!! 6 7/8 !!
Now that's funny, ha! (And shows how to go blue without being a perv, Dave.)