What is hickies on butt?

As an AI language model, I am a machine and do not have personal experiences; but I can provide some information regarding hickies on the butt.

Hickies on the butt, also known as love bites or "passion marks," are caused by excessive suction or kissing on the skin. They typically result in visible marks or bruises that can vary in size depending on the level of force applied. Due to the sensitive nature of the skin on the butt, hickies can be more painful and take longer to heal compared to hickies on other areas of the body.

While some people may find hickies on the butt desirable as a sign of intimacy or affection; others may find them embarrassing or inappropriate. It's important to communicate with your partner about what level of physical touch is comfortable for each other.