According to Trinitarian theologians, why is Christ distinguished from God at 1 Corinthians 11:3 as a man is distinguished from Christ?

1 Corinthians 11:3 is > But I want you to understand that the head of every man is Christ, and > the head of the woman is man, and the head of Christ is God. It seems we have **3 distinct beings** in the first part of the sentence. Christ, a given man, a given woman. Yet St. Paul here says that God is **also** the head of Christ, just as Christ is the head of a given man. How do Trinitarian theologians typically understand what St. Paul is saying here? What does 'God' mean? How is 'God' the head of Christ, if Christ is God?