While we're drifting off topic, I'd like to point out that, contrary to the OP,
anal sex != gay sex. [Interesting article from Slate.]
Moving back on topic, though, Droid's explanation for how Alpha 1 can fly all those different ships (including Vasudan ships, which presumably weren't designed with Terrans in mind) is fairly compelling, or at least I can't come up with a better one, unless Alpha 1s just have to be small so they can fit in ships of any class.
High-tech versions of the kind of adjustments found in cars today could probably fix the case of someone being too small to pilot a given ship class, but I don't think they could fix the case of someone being too big.
And I guess this pilot-shrinking technology can't propagate through space, since otherwise the GTVA would have a weapon that'd make enemy pilots itty bitty so they couldn't pilot their ships.
