My Conure (which was much smaller than your birds) did that too, until I broke him of the habit. Instead, I taught him to kiss. Loved to nibble at the lips. The girls literally loved him. He was a babe magnet.

Kissed the girls and made the cry.

God, I miss Louie.

Died of Teflon poisoning.

Stupid me.

I had him so trained, too.

He was more fun that half the women I ever knew.