It doesn't make you gay but you would have to be truthful to yourself at other times. Example, do you watch and pay attention to some males in school, some on TV, movies, some at the mall, some out in public places and check out their physical shape? Or just re-read that last sentence by replacing the word 'males' with the word 'females." You will know if you are, you won't have to ask the question. I use the word 'some' because it is still misunderstood by the general population that if you're gay, you are attracted to ALL males. It is no more true than saying that straight males are attracted to ALL females.
Given that you are a male and know how it feels to have an orgasm, probably seeing a male have an orgasm makes you feel sexy because you can relate to how it feels. Whether this means you are gay or straight is better tested by assessing what the images are in your mind when you get excited by yourself. Do you think of men or women when you are masturbating? Do you get excited in person by men or women? Do you have love-and-romance daydreams about men or women? That's all really the clue, not whether seeing a guy orgasm in a movie is stimulating.
Hi:) I wouldn't base it on watching ******* porn. I think at one point or another most people have peeked at all the different types of porn that's available...What I would ask u is are u attracted to males? and when u masturbate is ******* porn the ONLY type of porn u watch?