I was wondering this myself. I generally shower every day, and HAVE showered more often, and I wash my hands when I go to the restroom. I generally try to exit using my elbow, or leg. HECK, I EVEN try to use a purell type lotion after shaking hands, except I do that discreetly.
Having said that, there ARE some cases like a few days over the past 2 weeks because my leg was in such sorry shape(You would not BELIEVE how much walking I had to do over the past week with a very sore leg, and a knee that didn't flex much.), or a couple times because I was so involved I lost so much track of time, but those events probably added up to a couple weeks in my entire life. Also, they weren't times when I was going out.
Steve