Because every morning when I get the birds out of their sleep room, Captain (my Amazon parrot) and CB (a bare eyed cockatoo who is the love of his life) have sex down on their main perch for all to see. Since they are different species, this will amount to nothing more than sterile eggs laid by CB. But oh the look of bliss on their faces as they have their morning delight. It’s nice to know that someone or something in this house is having sex, I guess.