Bro's gf and sil like to ask my son to kiss them by the mouth. I don like the idea but everyone else seems ok about it. Why cant they give a peck on the cheek or son kisses them by the cheek? What i feel is, can my son happily happily kiss anyone by the mouth just because the person likes him? Eg: stranger by the road?(ok im very extreme, but just wanna state a general example)