And all in the interests of answering the question: why do some people find so much fuzz in their belly buttons? Steinhauser was eventually galvanised and took the lint in his own hands after ...

He was fascinated by the question: Why do some belly buttons collect more lint than others? But no one knew the answer. So for three years he collected his own belly-button lint to find out.

Perhaps these people with very small amounts of belly hair wore tight clothes, which helped carry the lint towards the belly button. Once it fell into the belly button, it wouldn't easily come out ...

Doug suffered from/enjoyed BBL. He thought that the hair on his belly was "channelling and concentrating lint from his clothes into his belly button". So he decided to test this theory.