Why do people act gay when they really aren't?

People infer things about people based on their appearance, mannerisms, speech patterns, interests, and other behavior. For example, if you saw a fit young adult male who has a military haircut and is to-the-point in their speech, you might draw the conclusion that they are serving in the armed forces. You might or might not be correct, but more often than not you would be correct.

The best way to find out why someone mistakes your sexuality as gay is to ask a person who you know to be kind for specific examples as there are many different things that could cause people to draw this conclusion.

Also, if you are a young person asking this and you are homosexual, you shouldn't try to change yourself to hide it better. That's a really big waste of time because there is absolutely nothing wrong with being gay. Just give it some time and you'll eventually grow up and get to see how much more fun gay people have than their straight friends.