This is just my theory based upon the reading i'v done here and my own head. very dependable. So to my understanding your supposed to be yourself because you have to show yourself to the other person and let them choose. In the same way that you choose fruit, you must feel it out first. If it feels right (and the person is good) then your in. If it feels mushy and grose (the person isn't for you) then a bad start. However if the person feels good but is really mushy and grose (being fake, pretending to be something your not to be liked), then when the person goes to eat you, then they will realize how grose and mushy you are and discard you.
That is my theory, please comment and give incite