Already Covered
Men are by nature generally stinky, hairy, smelly, and gross. Overall, we're not sure why women even like us at all, but we're sure glad you do.
Women are pretty, smell nice, are soft and cuddly, taste so good, and have good manners. We like you and can fully understand why you like you too. In fact, we encourage you to do so.
Two women together is twice the yummy.
Two men together is twice the icky.
I suppose two men that had all the nice characteristics of women would be fine, but let's face it, they don't exist. We're all gross...straight or gay. Why do you like us anyway? Hell, I'd even go so far as to say that porn that contains men and women is only fine because the women is there. Take her away and what's left? A hairy, stinky man wacking off. No good!!
(This is for humor. I fully embrace all forms of diversity...except pooping on each other, peeing, animals, and victimization. Save the hate flames)