I understand why many peg this a homo-friendly plot-point, yet I find it rather refreshing exploring what a single gender species would be like without outright branding them as gay for the pure left wing political correctness slant.
In their society as related on the series, no one is gay as 99.99% of them are male with only an occasional female being born. To have gayness, in my way of thinking, there have to be two distinct male and female parts of the population for them to be gay with--
Anyway, we agree to disagree on the gay/non-gayness of Bortus and Klyden but I am still no fan at all of gay marriage. That is before God and the Bible is rather firm on homosexuality being a sin no matter what the supposed majority of social convention has evolved into--
Besides, the Moclans can only tinkle once a year... 
so cut them a little slack!