There was no where for Roy to go, he stuck with his back touching the room's wall and right in front of him was the Arcanine he was supposed to care of, with her maw wide open, her tongue doing an inviting gesture and her eyes were locked into Ray's trembling hand. He had no choice but to do what the big fire canine wants.
Slowly, he raised his arm, shaking like crazy. Carefully, watching the white teeth and fangs of the Arcanine, he slowly placed his palm on top of her wet tongue. He cringed at the feeling of the wet rug but he kept his hand in place.
The Arcanine seeing his obedience, she closed her maw, deliberately not to bite his arm or hurt him. Her lips closed around his arm, his palm disappearing from his sight, yet he could still feel it inside her maw. Roy gulped, he felt the warm saliva go upper on his arm, he glanced at the Arcanine's gaze, she was smirking.
Then he felt her suck on his arm, bit by bit pulling his arm more inside her maw, disappearing through her lips. Roy started to panic, he tried to pull his hand back but her gut was stronger. He tried to use his other hand to push apart her lips, but it only slipped in, both his hands getting engulfed by her maw and pulling more in. He tried to walk backwards but the wall behind him didn't let him.
Both his hands were pass their elbows, his face approaching the lips of the beast. He looked at Arcanine scared. She winked then opened her maw and engulfed his head and shoulders, almost biting into his upper chest. His vision got surrounded by the insides of the Arcanine's maw while she pulled her head upwards, using gravity to aid in her swallows while he kicked his legs in the air.
The Arcanine swallowed again, pulling his chest and butt in, his arms going into the darkness of her gullet as his head was close to the drop. Roy tried to push backwards, but it was too slippery to make any movement. She smirked at his useless attempts of escaping. She sucked her legs like noodles, his feet disappearing between her lips. His whole body getting crammed in her maw, left to her mercy.