Regarding that last set of photos. Nope. Scratching a bird’s head/neck region isn’t considered sexual so much as affectionate. It’s called preening — bird couples do it to one another as a sign of love. It’s why parrots enjoy preening their owner’s hair/eyelashes/eyebrows/nose hairs. It’s petting on the back and stomach that is considered sexual, since that’s where parrots touch one another before having sex. The male crawls on the female’s back.
Okay, done now.