Contract Pilots even learn the handshakes.
African Handshake : Fold the $50 bill lengthways until it is only about 1cm wide and hold it between the index and the middle finger. As you shake hands with the official push in slightly with your middle finger whilst smiling. Avoid direct eye contact.
On-Contract Handshake : Best avoided altogether, but if this is not possible, best with rubber gloves. If these are not available, cup the hand as you shake so as to provide as little skin-to-skin contact. Unclasp handshake as quickly as possible. Do not use right hand for anything else until you have washed hands asap with antibacterial handwash gel.