If you take a picture of yourself from the side then you are a P and in that picture of you, your trachea is all the way to the back of your head, in the boy's picture, his trachea is very visual and in the front, can you see it? Can you see yours?
Point to the lobes of the trachea right under the chin.
You could be an INFp, but there is 0 chance of you being a J type.