By the word of course and by his behavior too. The little girl will go through a period where, dreaming of conquering her daddy, of having him all to herself, she would like to dismiss her mother who becomes a rival: it is the Oedipus.
The father will then pose the fundamental prohibition by responding to his daughter who tells her: “I will marry you when I grow up”, “I am your daddy and I love you but I am mom’s husband and when you are great you will marry someone of your age “.
With all pedophilia affairs, relationships parents have more questions about nudity and how they care for their child’s body, but that’s not a bad thing.
If a father feels uncomfortable, he should ask a professional who will explain the most natural way to behave with his daughter (or son). Now, you should know that for the psychic construction of your child, it is important to hug him, caress him and say sweet words to him.
Does the dad play a role in the development of his femininity?
It is essential that the father recognizes the femininity of his daughter. For example, he must tell her that she is pretty, that such and such a dress suits her well, offer her a feminine gift (ring, doll…) for her birthday…
If she is not recognized by her father as a daughter or if the fact that she is female is overvalued, she will surely show difficulties in her development or even in her access to her sexuality.