I agree with the others - it has to be over and it looks like the majority agree.....victory for us 'TP Overers'. I have a logical reason - when it rolls under, I imagine it's brushing the back of the possibly, germy roll holder.....not to mention it unrolls toO easily for the over zealous TP grabber. If someone puts it under, I grudgingly turn it around...unless I'm a guest at someones house lol.