Jimmy Fallon used his "Tonight Show" monologue to make light of a mundane habit by Robert F. Kennedy Jr., saying Thursday that the only thing Americans agree on about the controversial figure is that working out in jeans is strange.

"When it comes to RFK Jr., the only thing Americans agree on 100% is that working out in jeans is weird," Fallon said, adding, "It's just odd," during his opening remarks. The joke came amid continued national attention on Kennedy, who is known for his views on vaccines and other public-health issues.

Kennedy has previously addressed his choice of denim for exercise in an interview with Fox News host Jesse Watters last month, saying, "Well, I just started doing that a long time ago because I would go hiking in the morning and then I'd go straight to the gym and I found it was convenient and now I'm used to it so I just do it." Fallon referenced that explanation while delivering the monologue on the NBC late-night program.

The exchange is the latest example of late-night hosts using humor to comment on public figures' personal habits. Fallon often blends political and cultural commentary into his opening segments, a format that draws on guests' public statements and viral moments. The segment did not address Kennedy's policy positions directly but used the anecdote to elicit audience laughter and underscore how small, everyday details can become widely discussed when connected to prominent personalities.

Fallon's monologues are a regular part of television coverage and social media conversation; clips frequently circulate online after broadcast. Kennedy's remarks about his clothing habits have been reported elsewhere and were referenced in real time during the show, illustrating how late-night comedy continues to mine current interviews and commentary for material.

No further comment from Kennedy or his representatives about Fallon's joke was provided during the broadcast. The Tonight Show continues to air weeknights on NBC, where Fallon combines celebrity interviews with topical humor and occasional political satire.