Actually its not just sexually biased but racially biased as well. Female Elves get the most options, 6, followed by Female Humans at 5. The rest gets 4.
So what we should be doing is hating on Female Elves with their romance privileges. Down with the romtriachy ! Romance equality for everyone ! Sadly, they are a mystical race that doesn't exist.
To be fair, one of the straight female option will leave them at the end of the game. There is another who is a liar who decides to own up his mistakes and he too, could leave at the end of the game. Then there is one who is part of a totalitarian culture and can be made to remain in that said culture.
The gay male options could leave them with one who could either return to his homeland or another one who could be made to remain part of a totalitarian oppressive culture.
The lesbian female options leave them with either and adorkable Disney Princess or a childish Chav brat.
By contrast, the straight male option will either end up becoming a Divine or just be an adorkable Disney Princess.
So while the straight male has only 2 options, both options will almost always end very well. Being a Divine is not a bad thing, reforming the Seekers is not a bad thing, not doing either of those two things is not a bad thing and the adorkable Disney Princess will stay as our ambassador.
No dealing with recovering drug addict lover or no dealing with heartbreaks due to bald pajama eggheads or heart wrenching lies from a former Orlesian soldier or a childish brat with little character development or no dealing with Qun crap or no dealing with possibility of your lover going back to his homeland because he wants to emulate you or something.
There is something positive in everything.