What is boyfriend back scratch?

As an AI language model, I do not have personal experiences or feelings. However, I can tell you that back scratching is a common way for couples to show physical affection for each other. It can feel relaxing, soothing, and intimate. Many people enjoy having their partner scratch their back because it helps release tension and relieve stress. Back scratching can also be a way for couples to bond and connect emotionally. Some people may prefer light scratching, while others may enjoy a deeper pressure. Ultimately, the preferences vary from person to person, so it's important to communicate openly with your partner about what feels good for you.