Image imported from derpibooru 
Original Description:
 
Spike was walking down the road, heading to Fluttershy’s house. She needed an assistant to help her with her animals she was taking care of during the summer flood last year. A lot of animals lost their homes, so she decided to take care of a bunch of them, but she got overwhelmed the other day, so she asked for help, and Spike was lucky enough to be by her when she needed help. Spike walked up to Fluttershy’s little house, and walked in. Most of her furniture was made fresh from trees, and most of it was…..simple decoration, and nothing too fancy like Rarity’s house. He looked around, hearing Fluttershy talking to someone softly. “Fluttershy? You here?” He walked to the back of the house, and he saw that Fluttershy was outside with a bunch of wild animals, bunnies mostly, talking to them. “No no no! You all need to stop getting muddy! I’ve been spending almost every day just giving you all a bath. Please, why won’t you just try and stay clean? Now I have to clean you all again…..” she sighed, putting a hand on her forehead. “And now I’m all dirty, especially on my feet.” Her bare feet were indeed covered in a light amount of dirt, like someone spread chocolate icing on her feet, and it was very thin layering. “Oh, I wish I had some help. Where in Ponyville is Spike?” she said, distressed. “Right here, Fluttershy.” He walked up behind her, and she turned around, smiling and hugging him tightly. “Thank you so much for coming, Spike! These animals need to be cleaned, and need to stay clean long enough for the shelters to be finished. can you help?” Spike looked down at her dirty feet, licking his lips. “Spike?” he shook his head back to earth, and he nodded, saluting. “No problem, Fluttershy. we’ll have them squeaky clean. And I’ll even help clean you.” he said, which made her smile.
 
Spike and Fluttershy walked into the house, satisfied with the clean animals, and sat on the couch. Spike sat on one end of the couch as Fluttershy laid down, putting her head on the arm of the couch and putting her dirty feet up on a pile of pillows, so they were near Spike’s face. “S-sorry Spike…..I bet my feet reek, and it’s annoying you.” She was about to put them down when she felt Spike put his hands on her ankles gently, keeping them on the pile. “No no, it’s fine, Fluttershy. I actually really like them. They smell…” He took a sniff of her dirty soles, making Fluttershy gasp and giggle from the rushing of air. Spike got a whiff of stink. “Mmm, they smell great. They’re also kind of dirty.” he said. “Oh I know. I should really take a bath.” “Don’t worry, Flutter. I’m on it.” he said. “What was tha—ooh!” Fluttershy yelped in surprise as she felt Spike’s tongue washing her feet, licking up and down her soles gently. she didn’t have a smile on her face, but she was blushing, and she really liked it, but she didn’t want Spike to do it, mainly worrying for his well being. “S-Spike….s-stop it…..my feet are icky…..” she said, but he didn’t care. She laid on her tummy and Spike kept licking. “S-Spike, please…..you don’t have to do this just for m—ooooh!” She yelped again when she felt Spike’s tongue wiggle around her toes, and especially when he started sucking them, and licking them, getting the dirt off. “S-Spike!” she said again, but nothing she said would make him stop. eventually, all of the dirt was off, and covered in saliva, her feet remained. Fluttershy was a blushing mess as Spike walked out of the house. “So delicious.” he said. Before walking out the house, he turned to see a bright red blushing Fluttershy and he felt worried. “I-I hope you liked it.” “Oh yes. I really did, Spike. I was just worried about your well being.” she said in her sweet shy voice. “Aw, don’t worry. I’ve done it before. When I did it to AJ, she assured me not to worry, and you shouldn’t either. Well, I guess I’ll see you later.” He waved goodbye as Fluttershy did the same with a shy smile on her sweet face “Goodbye, Spike.”