Emily always was a competitive girl. She wasn't a strict feminist, but took offense at any suggestion that men possess greater physical prowess than women. She's certainly stronger and faster than most women.
Emily and I dated for years, and lived together for a while. She's of pretty average height and weight, has long blond hair, beautiful blue eyes, and large, natural breasts. My natural male strength advantage occasionally frustrated her, and I took advantage of her competitive side one night, in a good natured way.
Occasionally we would wrestle around with each other in bed, often partially dressed or fully naked. It was mostly just goofing around, but occasionally her competitive side would kick in and we'd wrestle more seriously. We slept on a full-size futon on the floor, which made for a good little wrestling arena.
I would get very turned on wrestling around with my girlfriend, our bodies pressing together, rolling around in physical contact. Being a bit stronger than her, I could typically overpower her after a few minutes and pin her. Aroused, I would want to fuck her, but thanks to her competitive nature she'd want to keep wrestling. Even when I had her pinned down and tried to slip my dick into her, she would squirm and hold her pussy clenched tight, so I couldn't slip inside her.
"Ok, Emily," I said one night as we started rolling around. "I think we need some ground rules."
"What sort of rules?" she asked.
"Well, once I pin you I want to have sex," I replied.
"Sure, once I'm done wrestling we can have sex," she responded.
"No, I mean when I pin you I want you to let me screw you, right away."
"How come you get to make the rules?" she asked.
"Ok fine, let's make a bet. How long do you think it would take me to pin you?" I asked.
"I bet it would take at least ten minutes," she responded, and I couldn't help but chuckle, much to her annoyance.
"Ok, tell you what, let's make it five minutes. We'll set a timer and if I pin you in less than five minutes, I win your body. I get to fuck you any way I choose, cum any way I want for a whole night, without worrying about your pleasure," I replied.
"Fine. But if I win you have to give me a massage, and have sex with me the way I want to. And you have to do all the chores for a month. Laundry, vacuuming, washing dishes, all of it," Emily added.
"I'm not sure that's fair, but since I plan to win, you're on," I told her, shaking her hand to seal the bargain before undressing completely.
"What are you doing?" she asked.
"I don't want you grabbing my clothes," I told her. "If you want to wear anything, that's up to you."
Emily pondered her options before stripping naked, to my enjoyment. While I'd seen her nude body plenty of times, I still preferred wrestling around with her naked, which allowed full skin-to-skin contact.
"Ok, so I have to pin your shoulders to the ground for a full, slow, three count within five minutes. You can be in charge of the timer. No biting, no kicking, no scratching, standard wrestling rules I guess. You can try to pin me, but you only have to escape for five minutes to win." I stated. "Are we clear?"
"You're on," she replied, giggling. "I'm gonna enjoy your massage, not to mention not having to do my chores."
At first she was pretty quick, while we were both standing. Eventually I managed to wrap my arms around her from behind. I held her against me, my semi hard cock pressing against her ass. For a split second she forgot she was supposed to be trying to get away.
As gently as possible I took us both to the ground with my arms still wrapped around her midsection. I wrapped my legs around her hips. She couldn't really move, but I realized I wasn't going to be able to pin her that way and the clock was ticking.