I identified as gay before I even knew what transsexuality was in a weird way, it always felt very wrong to refer to myself as straight. I couldn't imagine myself in a straight relationship, I didn't like straight porn, I didn't want to be referred to as straight, even though I WAS. Now I am out, and feel comfortable referring to myself as gay. Sorry that's not entirely relevant to your question haha. BUT what I wanted to say was, hormones will sometimes effect one's sexuality. A lot of guys who start T will notice themselves being attracted to genders/sexes that they weren't much interested in before. Myself, when I was on T for 6 months, gained an appreciation for tomboys more than I even had before. I definitely wouldn't call myself bisexual because of it, but for once in my life I understood what it felt like to be attracted to females. I still had very little interest in having SEX with a female, but a romantic relationship with a female seemed more natural than it did before. Once I ran out of funds and I was unable to continue T, I gradually lost interest in females again. I can definitely say that T effected my sexuality, but not enough to make me want to pursue a relationship with a female.