Why are male signs made from the forehead?

Male signs, often represented by the symbol of Mars (♂), are traditionally associated with masculinity and strength. The forehead is a significant area in many cultures, symbolizing intellect and authority, which may be why male signs are depicted as originating from it. Additionally, the forehead serves as a prominent feature of the human body, making the symbol more visually striking and memorable. This representation can also reflect historical associations between masculinity and power or leadership.