Is it possible to act (in speech, the way you carry yourself etc.)as a stereotypical gay man and not be gay?

Yes, Eric McCormack who played Will Truman on "Will & Grace" is Straight.

Yes, in a word. It is not really clear what you mean by "stereotypical gay," but some very effeminate men are entirely heterosexual. And especially in the South, heterosexual gentlemen above the trailer class have mannerisms and speech patterns very much like the Vaudeville gay man.

Much of what is the Vaudeville gay comes from what a little more than a century ago was called the "ladies' man." Speaking with a lisp, flamboyant mannerisms, showy attire, and so forth was once associated with very refined enthusiastic heterosexuals of the upper classes.

Yes. Over the years I've known a few guys who had very stereotypical gay mannerisms, yet they were married to women and in some cases had kids. And have you ever seen Bob Ross? He seemed to have very gay mannerisms, yet he was married 3 women during his lifetime and had one kid.

Yes. It's possible to act as such, so it follows that it's possible to be "gay-acting", even subconsciously, without being gay.

Sure. Hang around a lot of gay men who act like that and you too, will adopt their mannerisms, because humans are social and unconsciously copy each other.

I mean yeah you can. Guys do it all the time, doesn't make it right tho

Sorry, I must be put of touch. Just what is a stereotypical gay person.

You have a view of what this would be, yet due to you being swayed towards that view, you dont even notice the rest of the people around you.