Sexual Orientation is a term used to refer to a person's emotional, romantic and/or sexual attraction or non attraction” to a person, animal, place or thing
Chris' sexual orientation is pansexual by definition because Chris is attracted to transexual or intersexual people regardless of Chris' gender, however,"only you can truly know your sexuality becauseno-one can feel the things you feel except yourself" (cited under sexuality,by bi the way, United Kingdom Aug 11, 2006).
My sexual orientation is heterosexual, i want to fuck the opposing gender
My sexual orientation is homosexual, i want to fuck the same gender
My sexual orientation is bisexual, i want to fuck two genders
My sexual orientation is asexual, i either don't want to fuck things, or rarely want to fuck things
My sexual orientation is pansexual, i want to fuck your emotions/personality
Sexual orientations can be as simple as bisexual (attracted to both genders) or as complex as aego-demi-transquasi-pan-androgyno-graysexual. (Even I can't explain this one. I just now made it up.)
Normal person: What's your sexual orientation? I'm bisexual.
Tumblr User: I'm aego-gray-cupio-andro-apora-homosexual.
Normal Person: Oh, I was expecting some simple, like pansexual or asexual.
Tumblr User: *triggered*