Webster is a 1 1/2 yr old goldendoodle. He will "groom" us gently when he is feeling affectionate. This started one day when we were driving and he just came up and started nibbling on my shoulder. Sometimes he will do it unprovoked, sometimes he does it when we are petting him. It is always oh-so gentle and immediately stops if he accidently catches skin (he gets this shocked and embarrassed look if we say "ouch!").
I chalked this up to a Webster "thing" but Charlotte also will nibble when she is getting scratched. She does it as a mutual grooming ritual: you scratch my back, I'll scratch yours.
So now I'm curious: How many other Doodles groom or nibble their people?