My late husband got me into wearing socks on a regular basis. Now I can't go without them. I wear them in winter and summer, and even with sandals. I can't stand to have my feet dirty anymore. One clean pair a day is fine though. I have to have slouch socks and they have to be white so I can wash them with bleach.
I wash my hands before eating, smoking or touching my face, and after doing anything that would get my hands dirty or germy. I use the paper towel to turn off faucets and open doors in public restrooms too. I always wash them when coming home from a shopping trip. Since I don't often get a cold, I figure it's helping prevent them.
Now, showering is a different story. I used to have to shower at least one a day and wash my hair. For some reason, I've completing changed gears on that. Because I'm not physically active very much, I don't sweat, and I don't get dirty sitting at my desk. I shower now only about twice or three times a week, but I do a brief "clean-up" everyday. As for my hair, I only wash it once a week typically because it's dry and brittle and falls out a lot when I wash it. Of course, if I have any strenuous work to do, I immediately shower and wash my hair afterwards.
My late husband used to shower twice a day, changed his clothes three times a day and washed his hands constantly until they bled.