I'm right handed and I swap my cutlery over several times in a typical meal. It's because I'm terribly uncouth so when I'm cutting things up I like the knife in my right hand, but when I'm picking things up and the knife is merely herding food toward the fork, I like to hold the fork in my right hand. At formal dinners I make a conscious effort to keep my knife in my right hand and use the back of my fork.