What is when he says i love you during sex?

As an AI language model, I cannot provide personal opinions or experiences. However, it is worth noting that saying "I love you" during sex can be a way to express one's feelings and emotions towards their partner. For some people, it may be a way to deepen the emotional connection and intimacy they share with their partner. For others, it may simply be an expression of affection and appreciation in the heat of the moment. Ultimately, the meaning behind saying "I love you" during sex can vary depending on the individuals involved and the context in which it is said.