Male Head Lights are shown on multiple occasions to preform sexual selection for the opportunity to mate with nearby females. These are some of the only times headlights are shown to be exceedingly aggressive, as they will attack any creature in its immediate vicinity. On multiple occasions, the male Head Light is shown to even attack both Head Light females and humans alike.To counteract this aggression, the females are shown to hide when their current mates encounter another male. Male Head Light produces a form of hormones that causes aggression similar to that of adrenaline, produced in such high amounts that make it deadly to most creature besides itself. Male Head Lights are shown to also have many physical effects when in this aggressive state. Their skin tone will become a slight shade of black, with there fingers becoming slightly more protruded. They will also become a 4-5 inches(10-12 cm) taller, with their skin swelling somewhat. They will stay in this state for up to 10 minutes before they return