With the exception of Daphne, my parrots are obsessed with kissing. The greys constantly will yell, "Gimme a kiss!" and the other parrots respond with kiss sounds. When they're not on us and Thomas or I asks them for a kiss, they respond with the noise. When they're on us, they put their beak next to our (closed) lips and sometimes make the sound.
They occasionally get into what I call kissing contests, where they seem to compete to see who can give the loudest and/or longest kiss.
Stella was in a particularly kissy mood over the weekend. She kept running after Thomas, asking him for a kiss. He finally picked her up, and all she wanted to do was nuzzle against him:
She couldn't get enough!
He'd been having a tough week, and Stella knew just what to do to perk him up again!