My lovely collie border cross (long since departed :o() was a leaner!!! He was as soft as butter without a dominant bone in his body. Suffice to say he just loved contact - he would come and lean on us if we were sitting on the sofa, he would lean on visitors - always resting his head on their knees - he just loved to be loved. - But never a nuisance just such a character!!
I have to laugh remembering what he was like - if we told him to go and lie down t'other side of room - he would stay there for a few minutes, then slowly he would do the border collie creeping action, then a couple of roll overs and then shuffle over to us, trying to keep a very low profile!!!! Lol!!! (I guess he thought no one would notice!!!) and there he was again - draped over our feet and fully at home with his companions.
The only exception was in the winter when the fire was on - he would warm himself oneside, then turn round and warm the other side and then lie down in front of it sending up the zzzz's very content in his own wee world!!!
On walks he would always have a fun time but then would come back and cuddle up close as poss before we set off home - he was a wonderful companion and much loved.
We now have a cocker spaniel who is showing the same traits - such a good companion.
Who knows why different doggies act like that, but with us -
its never been fear , dominance or protection or whatever - its just the way they are. xxxx