Mice vs. the Christians

I had an thought when I heard the recent story that scientists found that a genetic alteration affected sexual behaviors among mice. If such discoveries support the theory that sexual behavior has at least some genetic cauality (not to open up the nature vs. nurture false dichotomy), would that mean that God, in his infitnite wisdom, deliberately created some humans to be homosexual ? Kind of shoots the whole, "If God wanted people to be homosexuals we would have Adam and Steve, not Adam and Eve" argument to pieces, doesn't it?

Along similar lines, those of you who are men looking for cheap deterministic excuses for bad behavior might point your spouses to this article