The only correct position is over the top. I know, I asked my butler and he almost had a cow about it.

Here's the original post from which these images were lifted. There's text as well.

Power to the top-rollers!

I disagree. The underrolled one is better. I poop on your conclusions.

If you have cats you will learn to love being a bottom roller, or find a long trail of toilet paper through the house. Cats are kind of like 2 year olds in that respect.