Okay Qatar I feel a great need to explain you a thing.
Gays don't have any unique behaviours that set them apart from people of every other sexuality, and it sure as hell isn't a separate gender. Gender and sex are two completely separate things, although many transgender children (if they are the usual MtF or FtM) are lesbian are gay before they transition simply due to the fact that they literally have the wrong body for their brain, and an overwhelmingly large percentage of the population is straight.
Also, it is very possible to not know your own sexuality. In fact, I first had a crush on a guy when I was in fifth grade (that's ten years old here) and I didn't realize what it was until last year when it all came together, my mind was more open to such things, and it all clicked that I was not straight or asexual. I thought I was straight or asexual for so long because it is extremely easy to just ignore whatever your body is telling you and doing, such as I said before, specific attraction to different males.