I saw this a the Museum of the Moving Image in New York. The kind of stuff that got produced in the early days of Star Wars merchandising will probably never cease to amaze me.
You probably need an adult (dirty) mind to think dirty about this but I don’t want to be parent to the kid who shouts: “Look, Daddy, C3PO has sticky white stuff coming out between his legs!” The “look” on Threepio’s face, however, is what makes this really priceless.