Two little boys go into the grocery store. One is nine, the other is four. The nine year old grabs a box of Tampons from the shelf and carries it to the register for check-out. The cashier asks, "Oh these must be for your Mom, huh?" The nine year old shakes his head and replies,"Nope, not for my Mom." "Oh, they're for your sister," replied the cashier. Nine year old: "Nope not for my sister either." Cashier, curious now; "If they're not for your Mom and not for your sister, who are they for?" The nine year old says. "They're for my four year old brother." Surprised, the cashier asks, "Your little brother right here??" The nine year old explains; "Well, yeah! They say on TV that if you wear one of these you can swim or ride a bike. And my little brother can't do either."