"Little Johnny" joke

> One evening, little Johnny was with his mother in the bath. He pointed at
> his mother's breasts, and asked what it was. She
> told him that they were balloons, and when someone will try to blow them
> up, they'd go in the air, straight to heaven.
>
> About two days later, Johnny ran into the kitchen and screams, "Mother,
> mother, come and look! Sister is dying!!!"
>
> Why, asked his mother."Because her boyfriend is on top of her, blowing her
> balloons, and she's screaming-Oh God, I'm
> coming."
>
>