Hermaphrodite Revenge

Professor Patrick Moran is an unusually brilliant scholar and a hermaphrodite as well. He is abducted from his home by aliens whose huge spaceship had crashed on a parallel world and are planning on using him as a breeder for their lost personnel. What they got instead of a pliant misfit was literally a tiger by the tail, who ends up destroying them and freeing all of the other abducted breeders.