Happened to me after I tried my first edible. Was sitting in the shower until the hot water ran out. Then it was a mad dash to hurry and wash up before the water was too cold.
Only happened with washing my hair. Sometimes do I do it twice because I forget for a moment and then when I start washing it again do I feel I have already done it 😂
I sometimes wonder if I have used soap when I am lost in thought, but I have always managed to answer the question by looking at the soap on the floor.