Jaune is a rabbit faunus, and as a rabbit faunus, he has certain peculiarities when it comes dangers and stressful situations.
He fucks, he has to fuck. When he was home, all he could do was jerk off or hold out til he could go to his room and rub one out. But now, in beacon with how many options around he doesn't have a choice.
That's what he told pyrrha during initiation as he bred her on the forest floor, in the ruins, and after she wiped a whole pack of beowulves. That last wasn't just stress. It was partly stress partly reward partly she was really fucking hot being a badass like that. It's what he told her when beacon kicked off and the stress of tests and spars pushed him to take her the moment they were out of eyeshot.
It's what he told Nora every time she surprised him in the showers. The many, many times, she surprised him in the showers and had to breed her ginger ass. Every time she declared to break someone's legs, you can bet your ass he was dragging Nora out back and mating press her on the grass.
And it's what he was going to tell Ruby after he knocks her up with a litter. Sneaking up on him because Nora said it'd be funny. At least her skirt made it easier to fuck her and her size made her just to pick up too. Their kids would be adorable, at least he thought, giving her first creampie of the day.
Being a rabbit faunus was super inconvenient, it meant that Jaune spent half the time horny out of his mind and the other half the time fucking like, well, a rabbit. It was bad enough before he was at Beacon, but ever since he came here he's had sex with Pyrrha hundreds of times because he just can't help himself, it's his instinctive response to stress. In the middle of a field mission, in the middle of class, in the middle of the hall, it didn't matter where or when, he would be assailed with the overpowering need to FUCK. Lucky for him his first mission had him pairing with Pyrrha, because he fucked her so hard in that forest she got addicted to faunus before she knew what hit her. She was so gracious in letting him fuck her daily from then on, he always appreciated it. Even when she was sometimes the reason he got horny in the first place, because damn is she hot as hell.
Nora on the other hand liked to surprise him, and when his adrenaline gets pumping then his libido skyrockets at the speed of sound and it's all that phat booty ginger's fault. She even does it in the showers half the time, he's convinced that she wanted this from the start. Even more when she comes back to do it again after he's already explained both with his body and with his words what'll happen if she comes into the shower with him. He gets so horny he can't think straight, and then he breeds Nora into a drooling mess with his superior faunus bunnydick every single time
Every time either of them did something to turn him on or he got stressed it was a matter of minutes before he'd be unable to hold back and have to fuck either of them hard full of his litters. It was all he could do just to get barely out of sight before railing his girls like the fuckbunny stud he is. At least it was just those two and he wasn't sleeping around a ton even if he fucked them a lot.
And then one day Ruby came along and tried to sneak up on him. He was really trying not to fuck around too much, too! But adrenaline gets him horny beyond measure and Ruby just had to catch him alone! While she was laughing at the way he jumped when she surprised him, she suddenly found herself getting picked up at a speed only a bunny breeder could match. Jaune doesn't even want to hold back at this point because Ruby is baiting him so hard.
"Sorry Ruby, it's rabbit faunus instinct. Didn't Nora tell you? Sorry, but I'm gonna have to fuck you until I calm down!" Jaune warned her only after he already had her picked up and was using her easy access skirt to just slam his enormous faunus cock inside her while Ruby was still struggling to keep up with the situation. No human girl could keep up with a faunus pounding with the ferocious intensity of a rabbit faunus like Jaune when he was horny. Ruby didn't stand a chance against that dick, she was squealing like a good little faunused slut before she knew it and Jaune was fucking her womb even harder and deeper with every passing moment.
"Gonna cum~!" Jaune warned, but again it was only after he had already committed to the motion of blasting her tight human pussy full of his ultra thick faunus breedspunk. He rapidly thrust into her even as he was cumming inside without restraint, making it so Ruby was cumming along with him countless times in a row as she felt herself get knocked up with his faunus kids just like Pyrrha and Nora had so many times over. At least their kids would be super cute, if they took after their mom and dad. That thought crossed his mind briefly as he realized he just got her pregnant for sure, but it was hushed up by the fact that he still desperately needed to fuck and breed and mate her over and over again until he was satisfied. Without hesitation he went right back into railing her broken and making her a faunused slut in love with him and ready to happily take all his bunnylusts into her any time.