Our girls are pets not food and they come when we call them, sit on our lap, and run to greet us when we come home if they are out in the yard. We nuzzle them and hug them but kissing is only for chicks!
I understand the attraction to kids and cuddle but they are outside birds that have the potential to carry a variety of diseases. I am an RN, and I would not encourage missing or getting your face too close to them add a rule. Just my advise, take it or leave it.