Ever heard the term that "Any man with a dick can have kids but it takes a man to be a father"
I think that's true in the ddlg world but with a different spin.
Yes, a Daddy should be good with the sexual side of this type of relationship, but there is so much more a real Daddy needs to be! He is the protector, the developer, the guardian, and much more.
Being a Daddy is more then being able to arouse a girl sexually or making her want to submit to you. It's about making her THE priority in your life. Building her up so that when troubles come she does not waver. She draws strength from your affection, your poise, your strength, your heart.
If you can't do this, or accept this, then you are not a Daddy. And you should not accept one of these lovely "little" creatures into your protection. You will only hurt them.