Today I went for a short ride. Didn't think I would need to bring the water bottle. Figured I would just be out for 30-45 minutes. The 90 degree weather didn't feel that hot. (Our first really hot day.) I never felt thirsty and while I was sweating, I wasn't sweating a lot. The last mile of my ride, my hands and feet turned numb and I was breathing hard on a route I thought I could do in my sleep at this point. Called my doctor and he told me I was dehydrated and to drink. I had thought the numbness might be related to my seat, but he said my hands wouldn't have gone numb. Anyway, no big deal, but another of my newbie epiphanies. I had no idea numbness was symptomatic of dehydration. And, I never felt thirsty or too hot. I never connected the need to drink in that moment. I will never leave home again without water.