No, parrots do not enjoy causing pain. Quite the contrary, they are extremely empathetic to our pain, sadness, depression, tears, etc. I once took care of a CAG (her name was Erika) for many moths while her owners got back on their feet and she would fly down to my shoulder and ask me in the softest voice: "You OK, sweetheart? You OK?" whenever another parrot would bite me. And my own Sophie CAG flies to my shoulder and quickly kisses my cheek when I scream in pain (always because of the amazons
) Parrots only bite when they are defending/protecting their mate/nest/babies or when they learn that this is the only way to get their point across BUT, like all other animals, they also bite when they are in pain and a parrot that is overly hormonal is also usually in pain.