The constant handshaking that goes on can result in later pain. One President, IIRC, remarked on that negative aspect of "politicking."
I always offer my left hand for a handshake. Reason? Arthritis. I found those people who try to impress me with their gripping power are less likely to give me a "firm handshake" on my left hand. A rough handshake on my right hand, even a single one, will result in at least a day's worth of pain and near-uselessness.
I was told once that left handshaking was offensive to people from some cultures. Tough *expletive deleted*it. Go home.
Terry. 230RN.