The woman assistant answered and said that the two men were on the way up right now. I asked, "What have they been doing down there?" She said, "They've been doing Caesarian sections on the animals in test-pen M-four." "Caesarian sections?" I repeated. She affirmed it, and Dolores Donet got a tight, little, humorless smile on her face. I hung up and said, "They're on their way up, and what's so funny?" She said, "You know what I think? I think you've been using Atummyc products on you." "So what?" I demanded. "I was responsible for this campaign, too. I've been waiting for a rash to develop almost as long as you have." She said, "When Bob comes in, look at his complexion. All three of us have been guinea pigs, I guess." "I still don't see what's so damned amusing." She said, "You still don't tumble, eh? All right, I'll spell it out. Caesarians performed on test batch M-four." "So?" "The 'M' stands for male," she said. She timed it just right. The hall door opened and Bob trailed in with a dazed look. The biologist was half holding him up. His white lab-smock was freshly blood-stained, and his eyes were blank and unseeing. But for all his distress, he was still a good looking young fellow. His skin had that lovely, radiant, atomic look--just like mine. ... THE END * * * * *