Homosexuality is a kind of sexual orientation. That means it's how you feel emotionally, physically, and mentally when it comes to having romantic relationships and attractions to other people. In the past, people believed that being gay was something "wrong" or a mental illness. However, nowadays, most experts agree that being gay is part of someone's natural identity. This is why the American Psychiatric Association changed the Diagnostic and Statistical Manual of Mental Disorders (also known as the DSM) to remove homosexuality from its list of conditions. This means that being gay isn't something that needs to be treated or cured—it's just part of a person's life. So, when it comes to the DSM, homosexuality isn't seen as a mental disorder anymore.