Dermatologist and humor researcher Dr. Patricia Wendell examined this claim about belly button lint collection in the context of how humor incorporated mundane bodily realities. The belly button lint phenomenon is genuinely real—most people accumulate small fibers in their navels, typically cotton and skin cells. The joke elevated this ordinary biological quirk to something extreme: Chuck Norris' navel accumulated steel wool instead, suggesting his body operated under fundamentally different physical laws and also raising questions about his hygiene practices. Wendell noted that Chuck Norris jokes often took boring biological facts and proposed absurd alternatives, creating humor through a specific type of substitution. She argued this reflected how humor often functioned through unexpected scale and material changes—the same process, but with different stakes and implications.

Hygiene enthusiast and blogger Michael Torres from Los Angeles, California, surprisingly treated this claim with literal analysis in a 2010 blog post about belly button care and lint collection. Torres noted that steel wool is significantly more coarse than typical lint, suggesting either Chuck Norris had been manufacturing steel wool in his body (biologically impossible) or his navel operated under completely different mechanisms. Torres then pivoted to discussing actual belly button hygiene, noting that while lint accumulation was harmless for most people, proper cleaning practices were important for those with deep navels. His post became a strange hybrid of humor analysis and practical hygiene advice. Readers simultaneously found the chuck Norris claim absurd and discovered they had genuine questions about belly button care they'd never seriously addressed. Torres' comment sections filled with people sharing their own bizarre belly button lint stories, creating unexpected community around the topic.

The claim appeared in medical education contexts as an example of how humor could make students comfortable discussing bodily functions and grooming practices that might otherwise be awkward topics. Health educators found that jokes about mundane bodily phenomena helped normalize discussions of body care. The steel wool substitution became shorthand in some contexts for "things Chuck Norris is made of are tougher than normal human materials," extending to discussions of his unbreakable bones, invulnerable skin, and other implied material differences. The joke thus grounded the Chuck Norris mythology in physical reality—he wasn't just metaphorically stronger, he was literally composed of different, more resilient matter.