Why does the white cockatoo on the right in @steveosideways' weekend video sensation preen and bounce around to Elvis Presley's "Don't be Cruel" while his partner on the left is unmoved (other than a brief, seemingly affectionate touch halfway through)? White cockatoos are monogamous and pair up for life, and they can grow bored unless their human owners amuse them.
And the Elvis look for the parrot on the right? Male cockatoos extend their head crest feathers when they're surprised by loud sounds (like guitar twangs). But it's also a ritual to get a mate's attention. Sometimes it works. Other times, he dances to his own beat.