Am I Going Nuts?

It is very hot today--in the nineties and has been hot for several days. We broke down and turned on the AC and it has been on for 2 days. So, when I got dressed today, I really didn't want to wear my usual long pants to Weight Watchers. So, I found some shorts, but to make sure, I weighed them on my WW scale, and then I weighed my usual weigh-in day pants. Fortunately, the shorts were several ounces lighter, so I wore them and enjoyed the coolness. Am I going nuts? Is this weight loss reducing brain cells, the ones that control good sense? The weigh in was successful and I am down .8 of a pound, and am at my lowest weight since I've boon on the program. I am now 4 pounds away from my goal.