Explaining Balloons

Little Johnny walks into his Mother's room and catches her topless.

"Mommy, Mommy, what are those?" he says, pointing to her breasts.

"Well, Son, these are balloons, and when you die, they inflate and float you up to heaven."

Incredibly, he appears to believe this explanation and goes off quite satisfied.

Two days later, while his mother is making tea, he rushes into the kitchen.

"Mommy, Mommy, Aunt Elise is dying!"

"What do you mean?" says his Mother.

"Well, she's out in the garden shed, lying on the floor with both of her balloons out.

Daddy is trying to blow them up for her, and she keeps yelling, 'God, I'm coming! God, I'm coming!'