I found this notion in a book, but I don't recall which one.
I have noticed in myself--and in many other parents--the habit of referring to themselves in the third person. "Mommy doesn't it like it when you do that" "Daddy has to go now." It's a form of separating oneself from ones actions or feelings, and I've come to the conclusion that that's not a healthy thing to be teaching our children.
After all, when Bobby hits Johnny, don't we want him to take responsibility for what he did? When Janie feels angry, shouldn't she be able to own her emotions, and be accountable for whatever actions she takes? Of course they should, and so should we.
We refer to ourselves in first person when talking to other adults; I don't go to the bank and say "Jenni would like to make a deposit today," do I? So what is the difference with children? Sure, perhaps we're trying to reinforce identity by referring to ourselves by name ("mommy") but I think that kids can figure that out by other means.
So when my baby is testing out his sharp new little teeth, and bites me, I say "ouch, you hurt me!" rather than "oo, you hurt mommy." Mommy isn't some disconnected person, it's ME and I just got BITTEN! When "I" am hurt, when "I" need to go, when "I" am upset, I am owning my feelings and my actions. (There is a second part to that of course, that nobody can 'make' anyone feel anything. They can say or do things we don't like, but our feelings are our own...)