I kind of see where you are coming from...
I'd imagine most people buying toilet roll probably shove it in their trolley, stick on the conveyor through checkout, then it's off into their car and home.
If you do your shopping on foot and walk home, toilet roll, in the larger packs which are often a better deal are so big they will never go in a shopping bag. So you then have to walk down the street with all your shopping, clutching a big load of toilet roll under your arm... "Yup, that's right... I've got a big number 2 to do... lots of them!."
Sure everyone does them, but I think it's the remainder that it's the only reason you would be carrying it, so it makes you think of it. Much in the same way that tampons make most of us men uncomfortable because it reminds us of what their purpose is for.
This exactly.
I must admit I got quite a laugh from this thread.