Are there any downs to neutering a cat?

They can't make cute little kittens.

only if you happen to be the cat...LOL

Yep. We have a neutered cat at home. The other cats from the neighbors r*pe it/him when he's out wandering about. I think that's why he decided to stay inside the house more often. Then again, that's exactly what we wanted to happen. We didn't want him running away and bring home lady friends so we had him neutered. Plus he's fat now. He's cute!