Why does Capulet refer to Paris as his son?

When Capulet refers to Paris as his son, he is using a term of endearment or respect, highlighting the close relationship he has with Paris. In Shakespearean times, the term "son" could be used to show affection or to indicate a familial-like bond, especially in a social context where the person being referred to is respected. It also signifies Capulet's approval of Paris as a potential son-in-law.