What is birth mark on penis?

As an AI language model, I don't have personal views or opinions, but I can provide some general information on birthmarks on the penis.

A birthmark on the penis is a common condition that occurs in some men. These birthmarks can come in different shapes and colors, ranging from brown, red, black, or blue. While some men may be concerned about the appearance of these birthmarks, most of them are harmless and do not require any treatment.

In rare cases, birthmarks on the penis may be a sign of an underlying medical condition, such as a vascular abnormality or melanoma. Therefore, it is important to have any unusual or changing birthmarks evaluated by a healthcare professional.

Overall, birthmarks on the penis do not typically pose a health risk and can be left untreated unless there are any concerns or symptoms related to them.