Ahem,
AFI-69.69 CO-PILOT UNION BI-LAWS
1.4 CP DUTIES. The CP is a valuable and integral part of any crew aircraft has many responsibilities. These include: finding sweet hotels when TDY in close proximity to speakeasies and houses of ill repute, AC ego maintenance, operating the landing gear, operating the flaps (some airframes), bailing other aircrew members out of jail, entertaining the crew with witty banter, quelling any navigator uprising and ensuring LMs stay out of the ACs box lunch. Under no circumstances will the CP, have to play wingman for a navigator (on crews with two navigators, they will wingman for themselves, preferably at a different bar from the rest of the crew) or take the fat chick (this is a loadmaster duty described in detail in TO XXX-1). EXCEPTION: Crews with radio or boom operators make delegate him to take the fat chick.