Logan is not the one abusing Kurt, this all takes place after Kurt is severely abused by someone else, because I'm a sucker for angst. Please be aware that Kurt is pretty much ferrell, and was abused excessively, so if that is a trigger, or just something you don't want to read, then please do not. 

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When Kurt was found, he was curled up in a dog cage, shivering violently, and whimpering lightly. There were scars from cuts in his fur, and he was unbelievably skinny, to the point where the X-Men were sure that if it weren't for his mutant DNA, he probably wouldn't have been alive anymore. Scott opened the cage, crouching down in front of it and trying to reach Kurt inside, but he whimpered, and bit Scott when he got too close. 

Scott pulled his hand back, and Storm took his place in front of the cage. Kurt was a lot more willing to come out of the cage for Storm, sniffing her hand a bit, and inching a bit closer to her. Storm reached a hand out, and Kurt coward away a bit, but when all he felt was a gentle hand petting the fur on top of his head, he relaxed into the touch. 

Storm was able to get Kurt out of the cage, but quickly found that he refused to stand on two feet, and that he wouldn't go anywhere until Storm clipped a nearby leash onto the collar around Kurt's neck, something she felt sick to do. The X-Men took Kurt onto their plane, and quickly discovered that he had a very strong distaste for men, not just scott, when he growled at Warren, and snapped at Hank if they got too close, but he was ok with Jean being near. 

Kurt stayed at Storm's feet during the flight, having taken a kind of liking to her when she pet him gently. Storm had tried to get Kurt to sit on the bench with her, but he refused, and when Storm tried to pick him up, he yelped in fear so loudly that it startled Storm into just letting him stay on the floor. When the plane landed back at the mansion, Storm lead Kurt inside, and lead him down to the med bay so Hank could look him over, and make sure he would be ok. 

Storm lifted Kurt onto one of the hospital beds despite his yelping, and then pet him gently to calm him down when he got scared. Kurt quickly got riled up again though when Hank came into the room, and he wouldn't let Hank anywhere near him, meaning Storm was the one who had to give him an IV, but the prick made Kurt yelp, and growl at Storm too, and he had a harder time trusting her. Despite the fact that Kurt didn't really like Storm anymore, she stayed in the room with him until Logan came in to tell Storm that it was time for dinner, and to debrief over their mission. At the sight of Logan, Kurt growled loudly, immediately becoming defensive, but all Logan did was growl back, and that made Kurt perk up. 

Kurt began sniffing in Logan's direction as much as he could without falling off of the bed, and so Storm made Logan come closer, curious to see if there was a reason why Kurt was no longer threatened by Logan. Pretty soon Logan was right next to the bed, and Kurt sniffed him closely a little bit before pulling back, and while he did look apprehensive of Logan, he didn't seem to be afraid.

"That's so weird." Storm commented. "You're the only man he's even let come into this room without trying to kill them."

"What does that mean?" Logan asked gruffly, and the brash tone in his voice made Kurt flinch and cower away from Logan a bit. 

"I guess he likes you. Try getting him to drink some water, he won't let me give him the bottle because he doesn't trust me after I gave him the IV." Storm handed Logan a nearby water bottle that had a straw sticking out of it to make it easier for Kurt to drink. 

Logan took the bottle from Storm, and sat down on the bed beside Kurt. Kurt scrambled away quickly, startled by Logan being so close to him all of a sudden, but there wasn't very much room on the bed from him to get away, so Logan was still fairly close. Logan held that bottle out to Kurt and waited patiently for Kurt to come to him. Kurt sniffed the straw of a the bottle curiously, and Logan took note of how he liked his lips and gulped quietly, clearly thirsty. 

"You can have it." Logan assured Kurt, trying to keep his voice gentle. 

Kurt didn't appear to understand, so Logan brought the straw to his own mouth and drank some of the water to show Kurt how it worked, then he held the bottle out to Kurt again. Kurt seemed to understand, and he tentatively sucked some water up through the straw to drink the water. Once Kurt realised that he was finally getting to drink some water, and that he wasn't going to get in trouble for doing so, he got more excited, and pretty soon, the entire bottle was empty. 

Logan chuckled, and pat Kurt gently on the head before getting up and going to a little sink in the room to put more water in the bottle. When Logan came back over to Kurt, Kurt didn't shy away, but instead moved a little closer to the man, wanting more water. Logan gently ran his fingers through Kurt's hair while he drank, finding that his hair was course, greasy, and matted. Kurt pulled away from the bottle when about half of it was gone, deciding that he had had enough of the water for the moment, but let Logan keep petting him. 

"Do you want to take a bath?" Logan asked Kurt, and the man looked up at him, looking remarkably like an animal that didn't know what Logan was saying. 

Logan lifted Kurt up and set him back down on the floor then hooked him up to his leash again, and lead him and his IV stand into a bathroom. Logan figured a shower wouldn't be good, because of Kurt's refusal to stand, so Logan began filling the tub with warm, but not too hot water. Logan didn't fill the tub too high, but high enough that Kurt's legs were underwater when Logan lifted him into the tub. Kurt seemed confused, and he moved his tail around in the water a bit, watching it move around him. Logan reached around Kurt's neck and unclipped his collar, looking at the tag on it before setting it aside. 

"Nightcrawler?" Logan asked, and Kurt looked up at him immediately, clearly responding to the name that was written on the collar. "That's....a pretty name."

Logan got a cup out from underneath the sink, and used it to dump water on Kurt, something he seemed to enjoy, and then he got to work on cleaning Kurt up with soap, shampoo, and conditioner. Everything was going really well for a while. Kurt seemed to like the feeling of Logan rubbing soap and shampoo into his skin and fur, and he liked the feeling of the warm water washing over him when Logan would rinse the suds off. But then Kurt started crying a lot, and whimpering loudly when Logan washed his rear, and he even went as far as to bite Logan so hard that he bled when Logan washed his crotch. 

Logan didn't mind the bite, and he made sure to continue to be gentle with his touches to help Kurt calm down again. He wasn't trying to make Kurt so upset, and it was actually quite disturbing to see Kurt so upset by Logan simply trying to clean him, but Kurt was very dirty, and unhealthy, and with the already terrible condition he was in, Logan thought that the last thing he needed was for his dick or ass to be infected. 

Logan finally got Kurt to calm down, and so he got him out of the tub and took him back to the hospital bed. Logan then managed to find a hair dryer in the bathroom, and he used it to blow dry Kurt's fur. Logan chuckled as Kurt basked in the heat of the blow dryer, spreading himself out, and rolling around a bit, enjoying the heat, and he began to purr a little, something Logan found kind of cute. 

Logan got Kurt to go to sleep when he was dry, but it was a battle. Kurt seemed to have a hard time sleeping in a bed, and he threw the covers off of him when Logan covered him up, but then he would start shivering, while curled in a tight ball at the foot of the bed. Through countless efforts of trial and error, Logan finally figured out that if he laid on the bed too, Kurt would lay cuddled next to him, and Logan's unusually high body temperature would keep him warm. 

So Logan fell asleep cuddled up with Kurt.