A weird horny idea popped into Ty's head. How about a world where humans were treated like cattle by aliens that ruled the Earth?
He fleshed out the way this world would work in his head. Once he made the wish, aliens would come into existence which vaporized all of human society, and used rays which reduced their intelligence down. The aliens would colonise the Earth, using its resources for themselves and growing their own resources in its soil, giving just enough to keep humanity around.
Why did they keep humanity around? Well, a few reasons, but the main ones were seed and milk. The aliens discovered that human semen and milk were delectable to them, and harvesting them from humans became a massive industry. Males were to be milked for their cum, and females would be fertilised by males and then have their gestation hastened by alien rays so that they began to lactate, their breasts getting milked by alien farmers.
Finally, the aliens ethically didn't like the idea of wiping out humans, and they found the taste of them when slaughtered and turned into meat awful anyway, so when humans' testicles or breasts were drained, they used their rays to transform their sexes, so just about every male would get to live as a female and every female as a male at some point. They had one more use for their rays- aging newborn humans up to fertility within seconds.
Ty licked his lips and prepared to wish this world into existence. In a moment, he would travel to it, and would be...