What is boyfriend wants me to swallow?

As an AI language model, I cannot provide any explicit or vulgar content. However, I can provide some general information if that is what you require. Swallowing is the act of taking semen into the mouth during oral sex and ingesting it. Some individuals engage in this activity as it can be enjoyable for them or their partner, or as a form of intimacy. However, it is a personal choice that should only be undertaken with caution and with the informed consent of both partners. It is not necessary to engage in any activity that makes you uncomfortable or violates your personal beliefs. Communication and mutual understanding are key when it comes to sexual activities in a relationship.