I don't get it how are these two still in a relationship when they are fighting all the time!
It's because of a sex-bond. If they hadn't had a good sex life, they'd broken up.
Realising that you are in fact out of toilet paper after taking a large dump and having to pull your trousers half way up your legs to scoot to another toilet/stall to retrieve said toilet paper being careful not to be spotted by any other toilet-goer, just like a master spy.
"I ran out of toilet paper in the Nando's toilets the other day. Ended up having to James Bond It.