That's a fair question. I've often wondered WHAT IT IS that repulses someone of same gender preference about the act of sex with someone of the opposite gender. I don't mean to be crass but, to quote one of my university professors, "After all, a hole is a hole." Yes, I can understand someone not being especially interested in sex with someone of the opposite gender but I wonder why they are repulsed by the thought...? Of course, the same question could be asked of heterosexuals and their repulsion toward the thought of 'gay' sex.
Actually, as I've mentioned before, the act of sex PERIOD is a tad 'yukky' when you REALLY think about it. It isn't the most hygienic form of 'pleasure' regardless of who it's done with. I don't know where God's mind was at the day He invented sex. But then, where was God's mind at the day He created the duck-billed platypus, the giraffe, the camel, the elephant, the hippo . . . . . .?