Would you be irritated if you woke up to shower and get ready for work, only to find out that your SO woke up a little before you and got in the shower and stole all the hot water? They know you have to be to work soon and they have the day off and have all day to shower, but they did it just before you needed to, knowing they would take all the hot water or simply didn’t care and now you have to take an ice cold shower. They knew you had to go to work too. And they do this often, even when you’ve tried to kindly ask them not to and they keep doing it.