Why because I wash my hands regularly? I admit its a little OCD but washing hands is also a good thing I think considering how often people don't. But I'm not as compulsive as I used to be; years ago if somebody came to visit me and wanted to touch my things then I would ask them to wash their hands first. I always gave them the choice. And if they did not want to wash their hands that was perfectly fine too, it just meant they could not touch my things. It's the same if somebody eats something here. I ask that they wash their hands afterwards if it involves them handling the food. I think its just a general courtesy to do so. I mean they would expect me to wash my hands before preparing food too right? I think its just good manners.