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”
It’s interesting because this also happens in other languages. In Dutch we only use couple (koppel) for people in a relationship.
If you are talking about other things we use “pair” if you have two. But over time people also started using pair wrong, so someone saying “ik heb een paar knikkers” I have a pair of marbles, can still mean he has 5 marbles.
In practice people usually just say I have two marbles when they mean exactly 2.