Nudity
Evolution explains why humans are basically hairless, but other primates have fur. During the many thousands of years of prehistory humans were naked because they lived where it was hot and humid. Before clothing, humans decorated their bodies with jewelry, paint, tattoos, and scars. They made belts and bags to carry tools. They made masks and disguises to be less visible while hunting. Migrating out of Africa, people used the same crafts to make body coverings, not only to protect from cold but the dust and sun of the desert. Being naked in public can be indecent exposure.