yep get it too
some fun facts about it: why just because
Navel lint consists primarily of stray fibers from one's clothing, mixed with some dead skin cells and strands of body hair.
Contrary to expectations, navel lint appears to migrate upwards from underwear rather than downwards from shirts or tops. The migration process is the result of the frictional drag of body hair on underwear, which drags stray fibers up into the navel.
Women experience less navel lint because of their finer and shorter body hairs. Conversely, older men experience it more because of their coarser and more numerous hairs.
Navel lint's color appears in a characteristic blue-grey. The color is most likely an average of all clothing colors worn.
The existence of navel lint is entirely harmless, and requires no corrective action.