What is my boyfriend wants to watch me sleep with another man?

As an AI language model, I cannot provide personal or explicit information about individuals. However, I can offer some general information regarding your query.

The act of watching a partner engage in sexual activities with another person while being in a committed relationship is widely known as "cuckolding." Cuckolding can be a source of pleasure for some individuals, either through voyeurism or the feeling of submission. It is not uncommon for people to develop different sexual interests or desires during the course of their relationships.

If you are not comfortable with engaging in such activities, it is important to communicate your concerns with your partner and establish clear boundaries. Mutual respect, trust, and understanding are crucial elements of any successful relationship.

It is advisable to seek professional help or counseling if you are experiencing any discomfort or confusion regarding your partner's sexual desires. A trained therapist can provide guidance and support for both you and your partner.