Have a talent for disappearing into the bathroom for lengthy periods of time the very second the thought 'I better get in the shower now' crosses your mind?
I've got to be at work in an hour. 15 minutes ago just as I formulated the thought 'must get my hair washed now to have time to dry it' the door closed behind him and now I've just heard him switch on the shower. He mentioned having a shave earlier and he's quite beardy of late so I can expect him to be another 20 minutes at least
I might add that he's not working today so has all the time in the world.
I know it's not deliberate or malicious and is just an annoying coincidence but it's every bloody time 
What other 'completely unreasonable to be annoyed at' annoying things does your DP / DH disrupt your life with?