Two little boys go into the grocery store. One is nine years old and
the other one is four years old. The nine year old grabs a box of
tampons from the shelf and carries it to the register for checkout.
The cashier asks, ‘Oh, these must be for your mom, huh?’
The nine-year-old replies ‘Nope, not for my mom.’
Without thinking, the cashier responded ‘Well, they must be for your
sister then?’
The nine year old quipped, ‘Nope, not for my sister either.’
The cashier had now become curious ‘Oh. 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 little
brother.’
The cashier is surprised ‘Your four year old little brother?’
The nine 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 of them!’