It is part of life that lots of people love to kiss & hug other people, when greeting someone. In my opinion it is quite normal to do this, but there are certain ways to kiss & hug, when greeting everyone beside your partner. When someone just gives you a soft hug & a peck on your cheek it is acceptable, but when it is not acceptable if you kiss on the lips/near the mouth or a tight hug. To me, it is crossing the line. What do you think when it crosses the line? As these two things are meant for your partner only.