Cub Driver wrote:

Because port remains the same, whereas "left" changes depending on
whether you're inside the plane (and if inside, whether you're facing
fore or aft) or outside propping it, for example.

Not to me, it doesn't. The left side of the plane is always the same side.

George Patterson
This marriage is off to a shaky start. The groom just asked the band to
play "Your cheatin' heart", and the bride just requested "Don't come home
a'drinkin' with lovin' on your mind".