Which way do you hang? Are you an inner or an outer? I'm talking about toilet paper, obviously.
I have theory, based on two marriages, two daughters and a lot of careful observation of the lavatorial arrangements of female friends, done purely iin the interests of scientifiec research.
Women will almost always hang a new roll of toilet paper with the free end on the inside, as in the first picture above. Men will almost always hang it with the free end on the outside, as in the second. Furthermore, a woman finding the roll installed the 'wrong' way will frequently change it before she leaves the room. Men, of course, couldn't be arsed and will leave it as they find it. (This applies to one's own home, of course. Anyone who starts rearranging their friends' and neighbours' toilet paper is suffering from CDO* or desperately needs a life.)
I suspect that the reason for the phenomenon (if it is a phenomenon, and not a product of my disordered 'brain') is the old one of form and function. A roll mounted 'inside' is neater; a roll mounted 'outside' is easier to grab. Pretty appearance, versus useability. The Ford Ka versus the Caterham Seven. Cats versus dogs. Do you see where I am going with this?
Anyway, we can't get anywhere until we have some facts. So, I am putting a poll on the right-hand side of this page to see if it's just me, or if other folk have found the same thing. Studies will then proceed on the basis of empirical evidence.
(Off work, lousy weather, bored, kay?)
* That's OCD with the letters in alphabetical order, as they should be.