According to a survey, 85 percent of men admit they surf the Internet wearing nothing but their underwear. Sixty-three percent said that's how they lost their last job.

In this joke, Leno riffs on the early-Internet-era stereotype of men browsing online in minimal clothing, then pivots to a punchline that ties private behavior to public consequences. The humor depends on incongruity: “surfing the Internet” sounds casual and harmless, but the implied setting shifts to the workplace, where being in underwear becomes a firing offense. The faux-statistical framing (“According to a survey…”) parodies the authority of polls and media factoids, using invented precision to make an absurd scenario feel plausible. Beneath the gag is a commentary on distraction, boundary-blurring between home and work, and the way technology can expose (literally and figuratively) unprofessional habits.