Undertale - What if Mettaton had never seen a human bare foot and toes?

With MMT's original body

"Just look at it… the way it walks. It's like a mini Mew Mew."

"I know what it is, Alphys. I know why it's down here. With it's… it's limbs all over everything."

After getting his new body

"Are those… penises I see wriggling on it's feet? Disgusting."

Well, it says for balancing and running faster.