Two vampires walked into a bar and called for the bartender.
"I'll have a glass of blood," said one.
"I'll have a glass of plasma," said the other.
"Okay," replied the bartender, "That'll be one blood and one blood lite."
A man and a woman were waiting 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 donation center.
Man: "Oh, hi there! Here to donate blood again?"
A friend and her husband were participating in a blood drive, and as part of the prescreening process, an elderly volunteer was asking some questions.
"Have you ever paid for sex?" the woman asked my friend's husband sweetly.
Glancing wearily over at his wife who was trying to calm a new baby and tend to several other children milling around her, "Oh yes", he sighed, "Every time."