Boxing? + Sex?
Countless Orgasms?
Alright lets see where this goes.
Warning this will have a TON of dom in it and a little violence as well, if you aren't into that then you have been warned.

Here be the rules. Human or Anthro, your choice. If you wanna be a 500lb beef cake then ok. If you wanna be a female Blaziken from pokemon, ok. Everything else, eh, I'll think about it. Sexual orientation is up to you and will determine your match up. So Anthro male/female vs human male/female may happen, if you have an issue with that let me know.

If you wanna take on multiple people talk to me, and your would be opposition. If they aren't cool with it, sorry pal/gal maybe next time.
How do you win? You make your opponent orgasm enough that they can't get up for the ten count. If you are planning on losing please put sub with your character, if you plan on dominating some poor fool please put dom with your character. If you put neither then you'll have to RP the battle, be nice and chose who will win.

Be fair, guys, don't think you can get away with a girl making you pop 4 times in a row and then stand right back up again. Girls same for you. If you plan to get out of a sexual move before they do to much "damage" then figure away out. I'll be judge so no one gets away with any kind of tom foolery.

Remember be kind, and have fun. Also you don't need to be an absolute brute either. You can be of a gentler type.

I'll give it a go.

Thesia
7'3" Amazonian with 11" cock and large GG tits.
*She walks into the area, to the cheers of the crowd. Her spear held high as she easily holds her large Spartan shield.*

(Sure why not?)

Alex
5'6" girl. D cup breasts and tight shaven pussy. Long, wavy red hair. I was kidnapped and chemically altered to be the perfect fuck toy: a pussy made to milk cum out of cocks and able to take much more stimulation without orgasming, perfect for extended fucking sessions. My master has entered me into the contest thinking my body modifications make me a shoo in (and a ringer), then placed a high bet on me (not angering my master is all the incentive I need)

I walk into the ring, clearly embarrassed, ashamed of my exposed body. I stand with my knees together pigeon-toed, one hand on my chest and another on my crotch, trying to cover myself from the crowd.

Sounds like fun.

Gannicus

6'2 human with 9"cock. He wears protective armour along his legs and groin, but show's off his carved chest and arms.

He enters the arena opposite Thesia, wielding a gladius in each hand. He gestures to the crowd yelling "Who's ready to see their new champion!" as the audience goes wild.

(So, what? We doing a three-way battle? I think OP was intending to moderate this, but they don't appear to be here right now...)

(Threeway... Sweet. But yeah, I planned on waiting for them to show up again.)

If the contestants are ok with the three way then go on ahead. I'll be here to check up on things every now then but i can't be here all the time. Also if someone is feeling left out I can RP with them.

(I don't care either way)

Then your good to go. ;) Have fun everyone.

I'm startled by the loud ringing of the bell, signaling that the round has begun. I move, clearly not by my own will, but simply following the instructions that were given to me in advance. I turn around, not even facing my competition, and bend over, sticking my ass in the air and spreading my legs as far apart as I can without falling over. A careful viewer would see that I am blushing brightly, embarrassed, albeit totally obedient. I hold this position, waiting for someone else to make the first move, my only movement being a gentle and inviting swaying of my hips.

Ok ill start off with you. I'd like this RP to start on a good note.

Name: Less
Male
White
Age 26
5'11
7" cock
Heterosexual
Black hair

"How did I find myself in this mess?" Less said to himself, already knowing the answer was because he lost a bet. Less walked to the ring completely humiliated, his crotch completely exposed. No groin protection they told him. They told him why. And it only scared the living daylights outta him. Less turned to a ref. "Hey, can I just hit one to knock them out?" The ref turns to him. "Theres no rules against it, but the crowd tends to dislike that." To hell what the crowd thinks, Less just wanted to get out of here before some huge guy with hard on for Less' little butt came strolling his way. Less eye the current people in the ring. The amazon? No
The spartan? Big no
What about...little miss look at my butt?
"So is she asking for it or is she just...blind? Either way it works for me."
However Less couldn't help but notice her absolutely stunning figure. Moving those baser feelings aside, Less got into standard boxing stance and moved in close to delver a quick blow to the hottie. She won't even feel a thing Less thought trying to reassure himself. And this might just be a mercy. Imagine what would happen if some sex crazed giant like that spartan got his hands on her...actually don't think about that.

When I'm aware of someone approaching from behind me, I immediately feel a wave of arousal run through my body unwillingly. I have no choice; I've been conditioned to. My pussy, still on full display, starts to get wet even without any stimulation. Anyone in the world would mistake these signs for sexual weakness, for me being an easy target, but in reality the reaction I'm having has been finely tuned to make guys cum, not me, which is exactly what gets competitors knocked out. Without even being aware of it, I rise to my tiptoes, just another false sign that I am ready to have my brains fucked out.

Less stops dead in his tracks. This girl. She's looks she about ready for the best meat shes ever had...Less thinks for a moment. Now how funny would it be, if Less went back to his friends and told them all not only did he survive the SKO arena but also got a girl that was 10x out of all of their leagues. Well his harden cock was in agreement. He didn't even notice the hard on at first. But hey. When in Rome. Or where ever we are. "You do as the romans...do...aw...heck with it...just screw the girl and go." Less ran up and jammed his cock in right there. "Listen lets just get this over with, so we can goooooo.....holy crap." This girls pussy was some next level type stuff. Just from the insertion Less was already shaking at his legs. "What the..." Less shook his head and tried to focus, he began to move rhythmically, focusing his movements on her clit as much as he could.

As soon as Less pushes in, I speak in a deviously seductive voice, "Thank you"
Again, this is all conditioning. I can no longer be penetrated without speaking these words. The ensuing pleasure moans, however, are entirely in the moment. Already my juices are flowing. Although I remain still, my pussy starts twitching with pleasure, certainly adding to Less' stimulation. After a dozen thrusts, my pussy starts convulsing wildly. This would seem to imply I'm having my first orgasm, and I am, but the pleasure I feel is mild at best. My enhanced pussy starts cumming, my juices bursting around the cock in me and running down my thighs.

"Ok, this is a good start. Lets add some more to this."
Less begins to move faster. His motions became more aggressive. But from his own actions Less works himself over the edge in her, and at about 7 more thrusts Less pops. Cum trickles out of Alex's pussy as Less starts to recover from a powerful orgasm. "Ok, that was just one on my end. Still good, I can keep going." But after a few more Less finds himself nearing that edge again. "What the hell? I just came, gah, ha, how am I this close to cumming again already?" Less trys to focus less ( ha get it? ) on his own pleasure and focus more on Alex.