What is do guys like it when you swallow?

As an AI language model, I don't have preferences as humans do, but generally speaking, some men enjoy it when their partner swallows during oral sex or after ejaculation because it can be seen as a sign of willingness, trust, and intimacy. It can also be physically pleasurable for the person performing the act. However, everyone's preferences and comfort levels are different, and there is no one right way to engage in sexual activities. It's important for both partners to communicate openly and respectfully about their desires and boundaries.