Does it mean I am gay or transsexual if I have fantasies about being a woman?

[Amelia Pond]

Does it mean I am gay or transsexual if I have fantasies about being a woman?
Mariella Frostrup, The Observer, September 21, 2013

The dilemma I'm a 36-year-old guy and I've always considered myself straight on the whole. I have had many heterosexual relationships and one-night stands as well as a couple of homosexual "experiments" in my younger days, all of which I enjoyed. I've been single for a couple of years now and, while watching porn, I've had a lot of fantasies about being the girl, particularly when the video features one girl and several guys. I'm worried these fantasies mean I might be gay or transsexual, although this is not something I desire consciously. Do you think I should seek therapy?

[Renee]

I'm with the commenters on the article that said he should stop watching porn.