Lightning Fluttershy

Absolutely not. If you were attracted to like a real life horse that would be weird. It's not weird to be attracted to a MLP character because they're basically the same as us with pony bodies. They have will, emotions, consciences, personalities, etc. Even if they have the body of an animal, they act as if they're human. I'm attracted to Fluttershy because of her personality and characteristics. and not to mention she's damn beautiful.

But she would need some motive for the original Twilight to have to go back. There was no Twilight before her to come back and tell her to.

This is something that's been nagging at the back of my mind ever since I watched the episode. The first time I watched it this was the first question to roll through my head. You're reasoning is sound and logical however you never answered the first question. Why did Twilight have to go back in time in the first place? Could it have been a prank on her past self? Twilight finding the time travel spell books and deciding to scare her past self by telling her there would be a disaster, thus starting a chain of never ending Twilight's going back in time to warn their past selves. She doesn't seem like the joking type though. Unless there really was a disaster originally and Twilight really did have to warn her past self, but when she went back to warn past Twilight, future Twilight somehow stopped the disaster from happening herself. This would work as there would be no longer a disaster inbound, just an infinite number of Twilight's heading back to warn their past selves.

Do you and Sam ever "get down"?

I'd say this clears things up very well and professionally. Therefore, our enemies are pokemon. Because Tumblr said so. Case closed.