How do you tell if a person is gay or lesbian? Some people assumed that I'm gay (Yea, I'm gay) because of my acting and sometimes I act straight (Depend where I go). Some gay/lesbian people can act straight and it's hard to tell. Like for Example Clay Aiken, You could tell that he's gay because how he act or his looks. A friend of mine who's lesbian. At first I thought she's straight but not. It's hard to tell because she act straight (she's a lipstick lebsian). Straight guys can be mistaken for looks gay because of metrosexual?