"I think I'll send you to my park's cow pasture. We can always use a larger herd out there. Some people love to see them, and they make milk for our ice cream parlor on the grounds."
"Seriously?" you say with a disdain. "You're just gonna turn me into a cow? With all the money your park probably makes, you could probably just buy another freaking cow."
"Oh, I'm not turning you into a cow," said the genie. "I'm turning you into a bull, to help me breed more cows."
"Wait, WHAT?! How dare you even JOKE about me doing bestiality? You think you can just show up and call me a cow-fucker?"
"I didn't 'just show up'. You rubbed my lamp and offered you wishes. And it's not a joke, I could use a new bull. And it won't be bestiality, because you won't be a different species from them when you do it."
"As if I would even do that--"
"Oh, I think you will. Besides, it's not like you had any better ideas when I gave you the choice. I've had masters who've made it there first wish to be a nice beefy bovine getting put to such good use on a farm somewhere. Have fun!"
Before you can say anything else, the genie makes a weird gesture and you're suddenly whisked away from where you were standing to another place. It's a grassy place, with large-uddered cattle all around you, but no genie in sight. You look at your body and pat yourself down. Whew! You're still human, unless that changes. You are naked, though.
"Hey! I liked that outfit," you say to no one. "The nerve of that genie to steal the shirt off my back on the way out here. Just a robber with flashy special effects, I guess. 'A transformation genie!' he said. To think I fell for it. Probably couldn't even transform bread into toast, the greedy pervert."
You look around at the cows, grazing and swatting away flies with their tails. One of them is sitting in a shady spot chewing its cud. There are dozens of cowpies scattered around everywhere that you'll have to step over on the way out. You can't believe he actually thought you were going to stick your dick in one of their filthy asses! You hope he doesn't still think that.