If you are in someone else’s home, which spot should you avoid touching? select the spot with the most bacteria:

If i’m in someone else’s home I should avoid touching the walls of kitchen and especially of toilet. Bacteria are present everywhere on the earth but the most are on the spongy dishes, garbage bin, cutting boards, kitchen sinks, pet bowls, and many other places. Hence it will safer not touch such a things. I will not prefer to go into someone else’s kitchen and toilet because there are number of bacteria present on such specific places.  

what are the choices?