"What's David's role? David looks good, that's what David does. David looks good, and I'm the funny one, that's what I hear constantly. But I keep telling him that looks fade"

Victoria Beckham is making a joke about her other half, David Beckham. She is suggesting that David is understood for his great looks, while she is understood for her sense of humor. She is also implying that she knows that looks fade with age, and she is trying to advise David of this. She is likely attempting to make light of the truth that she and David are known for different things, which she is not jealous of his excellent looks. She is also most likely trying to make a point that looks are not the most important thing in life, which it is essential to focus on other qualities. In General, Victoria Beckham is making a joke about her partner's excellent appearances, while also trying to make a point that looks are not the most important thing in life.