Many people think that there are certain signs you can look for to know if someone is gay. They may be effeminate, have a love of fashion or makeup and might even be into RuPaul's Drag Race. But these stereotypes are often based in homophobia and misogyny, so it's important to keep in mind that not everyone who fits the stereotypical profile is gay. In fact, there is no way to tell if someone is gay by looking at them.
The only surefire way to know if someone is gay is for them to come out and tell you. Some people will do this voluntarily, but others might find it difficult to talk about sexual orientation with family and friends. It's not unusual for a person to want to conceal their sexual orientation for fear of being judged.
If a person is hiding their homosexuality, they might make secretive social arrangements or be reluctant to reveal their friendships with men. They might also be evasive when discussing their weekend plans or become hesitant to describe other men in their social circle. This hesitancy could be an indication that they are gay.
Heterosexuality refers to the sexual and romantic attraction to people of the same gender. This includes both men who are attracted to other men and women who are attracted to men. A person who is cisgender is assigned a male or female gender at birth, while transgender or nonbinary people are born with a fluid gender and might identify as either a man one day and a woman another.