I am having some trouble

So, I am a straight (as far as i know) male but sometimes and i dont know why or remember when this started but there are times where i will jerk off to gay porn. I have only been with women and have never thought of or even tired being with a guy but sometimes i just enjoy getting off to gay porn. Should i explore my sexuality even though the idea of being with a guy does not excite me? Is it normal for straight men to get off to gay porn sometimes? Is this wrong and am i secretly gay or bi? any advice or insight would be appericated! thanks!