Navel lint
Encyclopedia
Navel
The navel is a scar on the abdomen caused when the umbilical cord is removed from a newborn baby...
cavity.
Many people find that, at the beginning and end of the day, a small lump of fluff has appeared in the navel cavity. This lint is an accumulation of cloth fibers that are scraped by body hair. The reasons for its accumulation in the navel are a subject of speculation. A likely hypothesis is that rubbing of navel hairs and clothing
Clothing
Clothing refers to any covering for the human body that is worn. The wearing of clothing is exclusively a human characteristic and is a feature of nearly all human societies...
contributes to a build-up of static electricity
Static electricity
Static electricity refers to the build-up of electric charge on the surface of objects. The static charges remain on an object until they either bleed off to ground or are quickly neutralized by a discharge. Static electricity can be contrasted with current electricity, which can be delivered...
resulting in the collection of clothing fibers and to a lesser extent, dead skin cells.