During high school, I had a teacher that had a seasonal hairstyle ritual: In the hotter months, he would shave bald, and once it started getting colder, he'd grow his hair & facial hair out, repeating this ritual for all of my 4 years of high school. To me it seems logical, given the hot climate of where I live, and I've adopted it for this summer season. Does anyone else have their own "seasonal" hair rituals?