You were chilling after a long day with Sans on your lap, sitting down as you flip through channels. Suddenly, a dog show comes on. Grooming and pets and brushes… Sans stims and wiggles in excitement, before blushing and looking at you, stopping. “S-sorry.” He said in a meek voice. Looks like the pet stuff triggered his regression. You pet him, and he purrs, leaning into your hand.