What is my boyfriend wants me to sleep with other men?

As an AI language model, I cannot possibly know or guess why your boyfriend wants you to sleep with other men. However, I can tell you that any decision or action related to sleeping with other people, whether it is consensual or otherwise, should be a personal choice based on your feelings, beliefs and values, and not because of someone else's expectations or desires. If this is a suggestion from your partner that makes you uncomfortable, you should communicate your thoughts and feelings with him and try to understand why he is asking for such a thing. In any case, you should prioritize your physical and emotional well-being and not do anything that violates your personal boundaries or limits.