The problem, Sage - Dark - etc., is two-fold:
1. Beantown is clearly locked into his position on this issue. You are beating a dead horse. He is not going to change his mind, and the acknowledgment of correctness that you seek will never come. Your work has zero payoff potential.
2. The argument is mostly just a tangent of the original discussion. All of the back and forth about whether or not homosexuals can or will reproduce, or whether homosexual relationships impact evolution, is off point. Ultimately, that doesn't matter. The main thrust of Bean's assertion is, if I am understanding it correctly, that heterosexual relationships are special because, biologically speaking, they are the foundation for propagation of almost every species. All of the peripheral arguing is, IMO, unimportant. And even if Bean is WAY off the mark regarding homosexual relationships, it doesn't automatically nullify his entire case. If he believes heterosexual relationships are special, that's all he needs. No matter how much science you throw at it, there is no way of quantifying "specialness". And ultimately, how important is one random guy's opinion to you?
That's my .02