Tattoos and piercings
Why is it that people many years ago tried to change their body appearance by putting rings around their neck and adding another and another until gradually the neck became elongated over years. Also binding a baby's head until it became larger. Stretching ears and inserting objects. Stretching lips to the extreme. Images of god's found tattooed on mummies.It would appear that they had experienced some contact with beings that left a great impression on them or their ancestors and as a result tried to emulate their appearance.
These beings were no doubt perceived as god's because of the advanced technology they brought with them, but they were just flesh and blood space travellers who came here for either raw materials, such as gold, or to have an influence on the primitive people they encountered.
Tattoos and piercings today are probably a remnant in the unconscious mind and why so many people inflict this decoration on themselves.
I can think of no other attractive reason. Can you?