There is truth to stereotypes, but this does not mean that somebody should feel pressured to follow one because it’s what society says they should do. A christian gay does not have to become agnostic. A femme does not have to become butch just to be seen as a lesbian (an issue known as Femme Invisibility). A masculine straight girl should not have to prove that she is straight by becoming feminine!
Stereotypes are not a tool for you to find out somebody’s sexuality or gender identity.
This is Vivian (91) and Alice (90), and they just got married. They’ve been dating for 72 years, and together they have visited all 50 US states, all the provinces of Canada, and been twice to England. Quote Alice: “We’ve had a good time”.