People who breed falcons have an interesting problem with an even more interesting solution. Falcons hatched and raised in captivity are not sexualy attracted to other falcons. They have a human fetish. People turn them on. In order to get a male to ejaculate the breeder basically lets the bird copulate with his head while wearing a special mask designed to capture sperm. He them collects the sperm in a pipette and turns on the charm towards a female bird to get her in a receptive mood so he can deposit the sperm in her.
The reason these birds are sexually attracted to people is that sexual preferences are imprinted on the birds at a young age and stick with them throughout their lives. Since humans instead of falcons were present at the right time in the birds development, known by scientists as the sensitive period, the birds imprinted on humans.
I'm thinking if the critical time period could be determined they could present the bird with a Pampers diaper to get the bird to imprint on that. If the bird had a diaper fetish instead of a human fetish the breeder wouldn't have to have the bird ejaculate in his face.
Research is being done on human sexual imprinting and the researchers are interested in fetishes. Evidence is mounting that many of our sexual characteristics are aquired through imprinting during the first 1.5 to 5 years of life.