If you had a magical paralyzed donkey (back legs) and everytime you spit on its face everything you ate tasted 1000 times better, would you do it? How often? Lmaoo xD

Sure, if the donkey doesnt mind being spat on. If it feels bad then i'd make it spit on my face in exchange, as long as the food i taste still taste 1000x better.
About its paralyzed hind legs, if the donkey's magical powers doesnt include self-healing, maybe i'll take it to the vet.