I called B.S. on the 'drink more water' swap but 3 weeks in I'm eating less

I always thought trading coffee for water was the lamest swap anyone could suggest. Sounded like something my old gym teacher would say. So when my swap buddy Dana told me to try it for 21 straight mornings instead of my usual 3 cups before 9am, I basically laughed at her. I was sure I would just be tired and grumpy and nothing would change. But two things actually happened: I stopped getting that 2pm crash where I used to buy a $5.75 sandwich from the deli by my office, and I dropped about 8 pounds without changing anything else. Turns out I was drinking my coffee with so much cream and sugar that it was basically a milkshake. Curious if anyone else made a swap that sounded dumb but actually worked.