The sweat thing is probably autism-related. The sunshine thing is some combination of that and me being ridiculously pale. I take vitamin D, have a family history of skin cancer, and do not experience depression, so I probably shouldn't be working too hard on learning to like sun. Sweat would be more beneficial to learn to like, and if you know of an actual disease that has hating sweat as a symptom, do let me know. But the vague concern that it might be something other than a very strong sensory preference like my other very strong sensory preferences is not actionable.