Asking a very basic question, plz dont judge me...

So i went to a restaurant yesterday and everybody around me started eating when their orders arrived , this seemed very weird to me as after touching "menu" which is touched by so many people , theu didn't washed their hands. Even if i dont touch menu i always have this habit of washing hands before eating anything . So i got up and washed my hands before eating anything , I don't go out often so i dont know these etiquettes well at all. Do u guys do the same or i am the different one ?