The Perfect Gift for All Ages! On average, humans will spend 92 days sitting on the toilet over their lifetime. To put this in perspective, that's about one-third of a year in the bathroom relieving yourself. - Are you ready to learn about: The microbiome in your bathroom. - Strange historical bathroom habits. - Unusual facts about famous artists. - Tech-related trivia. - Strange psychological experiments. While you won't learn enough to get a degree or anything, you'll feel better about spending nearly four months in the bathroom over your lifetime.