I experienced the feeling of “pas deja vu” this morning when I put the laundry detergent in my second load of laundry this morning. My thought was something like, “Hmmm… this doesn’t seem familiar. Oh shit.” If my (lack of) recollection is right, then I didn’t put any detergent in the first load. It was a funny way to realize something.
I’m too lazy to wash the load again, plus I remembered that the difference between washing a load of laundry with and without detergent is negligible, at least in the short term, according to Straight Dope. (They suspect that’s due to residual soap.)