The person who told me the best parts story ever was working at an FBO and was asked to order instrument air filters for a Piper Chieftain. Panel instruments can heat up quite a bit from friction and electrical power, so typically there is a fan drawing air through a channel to cool the instruments. In order to avoid damaging the instruments with particles or dust, the air is filtered. Eventually the filter gets dirty and has to be changed. All very sensible and logical. Hence the need to order new ones.
As you would expect, the air filters have a part number. Ordering airplane parts is much like ordering anything else. You contact the supplier with the part number and shipping and payment information and they agree to send you the part. Ordering of this part was uneventful. I'm just drawing out the story.
The parcel arrives. Inside the box is a poly bag printed with the Piper name and the correct part number. Inside the poly bag is the paperwork certifying these to be genuine aircraft parts. And inside the bag are five Tampax tampons. I don't mean five rolled wads of cotton with strings on the end, closely resembling Tampax tampons. I mean five actual Tampax tampons, still in the manufacturer's individual wrappers, designating them as "super" absorbency, not regular or junior. I'm afraid I neglected to ask if they used the "pearl" or the biodegradable applicators.
They cost approximately ten dollars each.
I also didn't ask if they came with insertion instructions, but I'm going to assume that if they did, they weren't the same as the ones Tampax generally provides.