For me, it may be that the toilet paper roll needs to have the open end away from the wall. I don’t want to reach under the roll to take a piece! That’s ludicrous!
That or my recent addiction to correcting people when they use “less” when they should use “fewer”
Plus slashes are more likely to be blocked by arbitrary character set validation, and fail. Dashes more clearly distinguish the segments and are more compatible
Spacing of the letter and fewer clutter is also very good with dashes.