unhygienic and annoying custom/habit. it's also fake. i was among a group of people and everyone has to shake hands with everybody? why does someone have to shake hands when they are saying hello and goodbye? why can't you just introduce yourself or say goodbye? unless you have just closed an actual business deal with someone, i think it's rude to try and shake someone's hand as it's pretentious and just strange. Even a smile or nod is good enough. do people need that much reassurance, they keep this creepy custom of making sure they spread germs among everyone and vice versa? i don't want to shake everybody's hands and then they do that all over again when they forgot they did that before earlier. ewww!