Donation Center

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

- What are you doing here today?

- Oh, I'm here to donate some blood. They're going to give me $5 for it.

- 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 donation center.

- Oh, hi there! Here to donate blood again?

- [shaking her head with mouth closed] Unh unh.