I never realized how easy it is not to touch so many things. I also never realized how difficult it is not to touch just as many.
Case in point: Using a public bathroom. The door to my work office must be bisexual — it swings both ways. Bump into it with your shoulder, with your butt… and you’re through either way.
Walk hands-free down the hall and push the bathroom door open with you backside. The urinals flush automatically, so the only touching I’m doing is to myself.