Nick was an horrible young guy of about 20 years, ever since he was 16 he had been intentionally getting girls pregnant against their will, by using condoms he had place a small hole in the tip of using a pin. He would identify when girls were fertile, the get them drunk, using special extra strength alcohol, to the point that they lost their inhibitions, then he would convince them to take him home, and have sex with him, using one of his special condoms.
Several of his recent victims, had their new babies in the same child care, one that magically transformed people into more useful items for the babies. These victims got to know each other and discussed how they end up having a baby, when they realized all theirs babies had the same father, they knew it wasn't just a mistake it just couldn't happen that many times to the same guy not by mistake, so they got together and planed their revenge. After working out how he target his victims, they recruited help from one of the workers at the child care center, she played the victim, while the young mothers were able to slip some drugs into his drink, allowing them to lead him to the child care center where they placed him inside the transformation chamber, and waited for the drugs to wear off.
Nick came to completely naked in some kind of sealed glass chamber, as his vision clear he noticed his newest target plus 7 of his previous victims were outside the chamber "What's going on here, let me out of here," he demanded.
"Why Nick we found out about how you tricked us how the condom failing wasn't a mistake, but planed well since your utterly useless as a men or father, were going to change you into some that will help look after some of you babies, it will also mean you can't hurt any more girls like you did us," one of them replies throwing him an evil grin.
"What are you talking about, you'll let me out of here right this minute!"
"Oh we'll let you out just as soon as we transform you. You see this child care center has a very special use for people like you, were going to transform you into a ...."