I would be shocked but I would give hugs and kisses back because maybe they just needed to be comforted 또는 else they are just doing it for the fun of it. but at the same time I'll be thinking 'What is happening?'
Well, if it was another guy, I would push him away and get out of there fast. If it was a gal, I would accept the hug, but stop her from 키싱 me. I would ask if she had me confused with someone else. Hugs are ok, but kisses 당신 have to be 더 많이 carefull about. Who knows what 당신 could catch from a stranger? Now, if the gal was a real knock out, I might forget my rules and just go with it. :P