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