On that Donkey x Dragon from Shrek. What if instead of (just) screwing the Donkey. The dragon eats the Donkey, but threw in a 'marriage' necklace so he can fuck her from inside her gut. Being "privilaged" to eat from the insides, at her leisure and mercy...
Especially if one goes the "long road mile" of "if sperm can reach from the digestive tract, to the vagina/womb" and from there, egg pregnancy?
Crazy Man goes "Moon rabbits! Their adorable forms must be a means to facilitate BRAINWASHING so they can launch an ALIEN INVASION! I must inform the world of THE TRUTH!"