We set you up for the date first, then we ask the personal details. You can tell us your gender and orientation later on (and they don't even have to match what you asked for on the date).
How does this prevent a heterosexual male "seeking women" from being matched up with a homosexual male "seeking men"? If you pair those "seeking men" with those "seeking women?" I imagine your users may be upset if this confusion is a possibility.
