It wasn't a matter of syntax so much as being completely underwhelmed by the monotonous and often infinitely recursive question 'why'.
Why do I find both images equally disgusting? Because contrary to the attitude seemingly popular amongst most males, I don't consider two women going at it to be any less repulsive than two guys going at it. Why? Because at the end of the day it's still homosexuality and it's something which happens to turn my stomach. Why? It just does. I can rationalise it to a certain extent but I can't be bothered explaining because aside from the fact that it likely lead into another lengthy argument about rights and morality which I have no interest in exhuming, at the end of the day it's not something I should even have to rationalise any more than you should have to rationalise disgust at seeing something like Dame Edna going down on George Bush.