Ass Fingering Am I Gay?

She started fucking my anus using her middle finger. The sensation was phenomenal. I started having an orgasm, which lasted a good 7 to 10 seconds. It was the very first time that I had had an orgasm due to anal stimulation. I was very intrigued by what I had just experienced. I asked myself several times if I was actually gay or bisexual. I had simply never had an anal orgasm before.