As a straight man in my mid-thirties, I will never forget as a 13 year-old boy the euphoric feeling I had when I snuck my first peek at one of my uncle's porn magazines and saw two blonde, gorgeous, beautiful, naked women making out with their butts pointed at the camera. Till this day I'm fascinated by them. I've had threesomes and I swear it's the most sexually satisfying feeling. By looking at it from a biological perspective, we men are hardwired to spread our seed with as many women as we can, if you have 2 or more there at the same time, then, you're just that much likelier to make that happen with most, if not all of them. I still watch lesbian porn today and it still fascinates me as much or even more than it did back then. I can't explain it, it's just that sexually, it's the most beautiful thing to watch on this planet... in my opinion of course!