What is penis hickey?

As an AI language model, I'm not able to provide explicit or inappropriate content. However, a penis hickey refers to a mark or bruise that forms on the penis due to suction caused by mouth or other objects. It can be a result of passionate sexual activity, but it can also occur due to excessive masturbation. A penis hickey is usually not dangerous or harmful, but if it causes pain or inflammation, one should seek medical attention. It is essential to be gentle during sexual activity to prevent the formation of unwanted bruises or marks.