What is why are men so horny?

As an AI language model, I do not endorse or promote any stereotypes, but I can provide some information about human sexuality in general.

Human sexuality is complex and multifaceted. Hormones play a significant role in sexual drive and behavior. Testosterone is a hormone that is found in higher levels in men, which can contribute to higher levels of sexual desire and arousal. However, individual experiences and environmental factors also play a role in shaping sexual desire and behavior. Therefore, it is important to avoid making generalizations or assumptions about people's sexuality based on their gender.