Draw a pony in love/draw a pony ship(ping). Rainbow Dash gets very competitive about these sorts of things. I think they both knew Twilight could have won using alicorn magic, but she let Dash beat her in a pure grappling contest instead. It was all in good fun, anyway. Now that their blood's flowing a little bit, maybe they'll engage in some further grappling? Maybe with their lips?
This came out looking more suggestive than I intended. Their lower bodies align just a little too perfectly, if you know what I mean. They aren't even in a proper relationship yet! You could cut the sexual tension with a knife, though. That's how I envision it, anyway.
I had the sketch for this mostly cleaned up when I turned my wrist the wrong way and felt a sharp pain. I can't move it in the ways I need to draw anymore, so I scanned the sketch and polished it some on the computer with a mouse, which my sissy arm seems to be okay using. With luck, it'll be feeling better tomorrow and I can catch up on the training ground prompts.