It always seems to be the same, it starts with the mouthing, then the nudging with the nose and finally the I want attention paw.
A good thing about newfs is they understand and learn so easily. My wife has a disability and uses crutches, both our girls respect her. They wait for her to sit down then sit in front of her for attention, no paws, no noses, just patience. I on the other hand get the works.
We havn't gone out of our way to train them but Liz has always said No and ignored them until she is ready to give them attention, whilst they always get a cuddle from me for the asking. the result is different behaviour tailored to the individual. Its fun watching them with guests, you can see them thinking, is he/she a paw person or a sit person, if people make a fuss immeadiately, they get the works, if they ignore them, they will sit in front of them as proud as punch so that the person cant go anywhere till they've acknowledged them.
God help anyone who comes to our house, gets down on their knees and cries, "what beautiful dogs." arms outstretched. They disappear for about five minutes under a mountain of black fur and return to this world suitably slimed, but then they asked for it!
Oh I do love Newfies.