Like many content creators, Hally Lee (not her government name) posts popular step-by-step recipe videos on TikTok for smoothies, muffins, and other snacks. But unlike the food-prep how-tos we’ve all become familiar with, Hally’s recipes and routines are specifically designed to help you poop better.“This is what I meal-prepped as a certified pooper,” begins one of Hally’s videos with more than 2 million views. “I like to hit my butthole first t…