They look very friendly.
......*backs away.*
I like playful dogs........there used to be a Somalian girl in my class who i went to the park with. She patted a dog on its head. Her mother rushed her home, made her take a bath then a couple of showers and a new set of clothes. In Islam if you touch a dog, or its saliva then you have to wash your hands seven times or as some people would rather much like to do-until the soap runs out.
I don't see touching dogs as unhygienic especially since the ones in western countries are well groomed and treated.