Yo look at the offering - it's a sheep skin. "Uh, let me see if I can get my clothes on." You struggle with the shirt, which seems to have shrunk several sizes. It seems to loosen up though, and you manage to pull it on without tearing any seams. Your pants are another matter. Can you possibly pull them over your legs? More struggling, and finally you have them yanked all the way up. As you struggle to get the zipper to close, you realize your shirt isn't too tight any more. And when you get the zipper up, even your jeans stretch out enough that they fit comfortably. You turn back to the woman, feeling smug.
Then you blink, your eyes level with hers when you were almost a head taller before. "Huh? What's going on?" Your voice sounds weird, too high and thin. There's a mirror on the dresser by the door, and you look in it to see the reflection of a 15 year-old boy! It's not even you at 15 - this kid looks shaggy and dull-witted, maybe even a little retarded.
The woman smiles. "You'll be a perfect farm hand. Young, strong, and stupid. And you;ll stay like this forever."