Donating

A man and a woman were waiting in line at the hospital donation center.

Man: “What are you doing here today?”

Woman: “Oh, I’m here to donate some blood. They’re going to give me $5 for
it.”

Man: “Hmm, that’s interesting. I’m here to donate sperm, myself. But they pay
me $25.”

The woman looked thoughtful for a moment and they chatted some more before
going their separate ways. Several months later, the same man and woman meet
again in the same line.

Man: “Hi there! Here to donate blood again?”

Woman: (nodding her head with mouth closed) “Unh unh.”