Biting

[sammy101]

For you first question, I'm not too sure why he would do that. Its probably something that he likes to do. I think its a Retriever thing to do.

Your second question, my Kodie does the same thing. Its a sign of affection and its nothing to really worry about.

[lizbud]

On the first question, I think it's a anxiety reducer for some dogs during
the excitement of greeting folks at the house.

As for the gently mouthing your wrist or hand, probably a greeting to you
both when coming back home.It's the same way some dog friends greet each other. Some dogs are more mouthy than others.Or the dog might just be
trying to herd you.

[zoey]

Retrievers do hold things in their mouths at certain times.
It's funny. Both Roxy and Daisy do this. When I toss the frisbee-if they need to tinkle they'll do it w/ the frisbee in their mouths. It's a control/comfort thing. Rocky, a golden i know well, always has to have a tennis ball to control. But he never retrieves-like handing it off, to a human. If left unchecked, and without much attention from humans, otherwise, they can get very neurotic w/ those balls.
I'm a bit intolerant about teeth, so i wouldn't allow the gentle wrist biting thing. But then, my dog has a dominant personality. If the dog was always gentle otherwise, i wouldn't worry.