If a student asks, “Why do people call me gay?” you have the opportunity to explain that if someone calls you a name, it’s important to consider why they did so and how best to respond. It’s possible that they’re not trying to be mean; they may simply be ignorant of what the term actually means.
Gay means that you are attracted to a person of the same sex as yourself, whether it’s men or women. It’s also possible that you have romantic and/or sexual attraction to more than one sex or gender, and that’s called bisexuality or being bisexual.
In the past, when homosexuality was illegal and decriminalized in many countries, homosexuality was often hidden from view by euphemisms. For example, a man who was single might be described as “gay” rather than “unattached.” Likewise, a woman with lots of boyfriends might be called a "gay girl."
Anti-gay activists often use falsehoods to demonize people who identify as LGBTQ, including claiming that homosexuality is linked to pedophilia, child abuse, bestiality, bigamy and polygamy. This is untrue, and it’s a sign of ignorance that needs to be corrected.