God I love this thread.
When dh and I first met, there was a house painted purple next to the bus stop outside his flat. Every time we go past this house, even though it isn't purple any more, we have to say "purple house purple house" in a stoned voice. The DC are embarrassed by this.
We constantly say the same thing at the same time, and do a mini fist bump ( I'm cringing now) Whenever we settle down to watch something like Masterchef, where we know we will, for example, simulataneously shout "wanker" at Gregg, we sit with our fists together in readiness.
We are both chronically indecisive and settle things with "rock paper scissors". This has settled decisions such as where to get takeaway from, and shamefully, names of our DC.
If I have slept on one side all night, I wake up with a sore ear. I say "T.E.S" which means Tender Ear Syndrome, and dh squishes my ear gently with his fingers. It feels bad but good!
If DH is pushing me in my wheelchair, if I want to stop and look at something, DH pretends he isn't going to stop, and pushes me past before reversing. No idea why but this cracks me up every time.
Dh also cannot tell the difference between a skirt and a dress and if for example, I ask him to pass me my red skirt, he will pass me a dress. Every Single Time. I always get exasperated and he says, in the manner of Basil Fawlty "quite right dear, I only did it to annoy you".
We have been together over 20 years, I'm sure there is loads more. We are always laughing together, even though life is a bit shit atm. He can always make me smile.