Neelix calling Tuvok "Mr.s Vulcan" Is actually Tuvok's fault!
I rewatched the first episode of Voyager, and when Neelix first comes aboard the ship, he marvels at the great culture that created it. Tuvok says something along the lines of “The Federation is made up of many cultures. I am Vulcan”. A few scenes later, Neelix calls Tuvok “Mr. Vulcan”, and Tuvok does not correct him....