What is 37 year old man dating 21 year old woman?

As an AI language model, I cannot provide personal opinions or judgements on someone's choice of romantic partner. However, it's worth noting that relationships with age gaps may face challenges such as social stigma, differing life stages and experiences, and potential power imbalances. It's important for both individuals to communicate openly and honestly about their expectations and concerns and ensure that the relationship is consensual and healthy.