How do the most relationships start? With a greeting. There are multiple ways of greeting someone. Could be a handshake, a kiss, a handkiss, nodding of the head, a bow, a hug, taking of your hat, waving, winking en saluting.
Did you know there are tribes who greet each other by touching the genitalia? Hmmm...
Let's focus on handshaking for now. In the modern world it is one of the most common ways to greet. Wether it be at a first meeting or between old friends.
Original it came from the knights showing good fate and 'saying': I bare no arms. So you could say it was a sign of trust or reconciliation.
How do we shake hands in a good way, some tips: