Having been visited by my father-in-law over the holidays, an odd thing occurred. Every time I used the bog, I noticed that the toilet roll was hanging the wrong way round. I kept changing it back. Speaking to my wife after he left she said that she had noticed and had done the same. I have no idea why he felt the need to adjust it, but it made me question my whole toilet roll belief system so I turn to the wise GF to either back me up or show me to be wrong.
Now the way I think it should hang is outwards as shown here:
But he always put it on with the edge facing inwards towards the wall.
Let the GF decide.