Things our SO do to frustrate us

What is something your SO does that frustrates you?

Here is mine: before my fiance gets in the shower he goes #2 but he starts the water so it warms up before he finishes and doesn't flush afraid it will mess with the water. Sometimes he remembers to flush when he gets out and other times he doesn't. In the events of him forgetting I'm usually the one to discover it and it just so happens to be when I'm about to pee my pants so I have to pray to God there is no splash up when I pee. It's very frustrating!