A man and a woman met at the donation center, and the two chatted. The woman said, “I’m here to donate blood, and they pay me five yuan.” The man said, “I’m here to donate sperm, and they pay fifty yuan.” The woman thought about it for a long time. Then the two broke up. After a few months, the two of them met again at the donation center, and the man greeted “Hi, do you want to donate blood again?” The woman closed her mouth and shook her head while making a “oooo” sound…