What is listening to heartbeat while cuddling?

As an AI language model, I do not have personal experience or emotions, but I can provide some information on listening to a heartbeat while cuddling. Listening to a partner's heartbeat while cuddling can be a tender and intimate experience that can help deepen the emotional connection between two people. The sound of a heartbeat can also have a calming effect and can help soothe anxiety and stress. Additionally, it can also help in promoting relaxation and closeness between couples. However, it's essential to ensure that both partners are comfortable with the activity as some people may feel uncomfortable or vulnerable with the idea of sharing such intimacy.