A man wearing a balaclava bursts into a sperm bank with a shot gun. "Open the safe!" he yells at the girl behind the counter.

"But we're not a real bank," replies the girl. "This is a sperm bank, we don't hold money."

"Don't argue! Just open the safe or I'll blow your head off!" he shouts. She obliges and opens the safe door.

"Take one of the bottles and drink it!" he says.

"But it's full of sperm," the girl replies nervously.

"Don't argue, just drink it," he says. She takes off the cap and gulps it down.

"Take out another one and drink it too!" he demands. The girl drinks another one.

Suddenly, the guy pulls off the balaclava and to the girl's amazement it's her husband.

"See, it’s not that difficult is it?" he says.