It’s important to keep a lid on it while pooping.

The U.K.’s Metro news has reported that grunting through a bowel movement is counterproductive — it might feel right but it can actually make it harder to complete the task.

“Basically, it is all about pressure,” Jan Fallingborg of Denmark, from Aarhus University Hospital’s gastroentorolgy department, told a Danish newspaper called MetroXpress, according to the U.K. publication. “That pressure decreases when we let air and noise out of our mouth. Therefore the release of forced sounds should have the opposite effect.”

The most that can happen is that the pooper will get a “psychological satisfaction,” Fallingborg said.

It’s not the only recent poop-related news that has shattered people’s perceptions about how to let it go — the release of a product called the “Squatty Potty,” which elevates the knees beyond a 90-degree angle while someone is on the toilet, ignited a conversation online about the health benefits of squatting while defecating as opposed to sitting.

The Huffington Post explained that sitting only partially relaxes the muscle that gives us bowel control, while in the squatting position it is completely relaxed. The publication said, “Basically, humans are designed not to leak, so in an upright position, there is a bend in our digestive tracts between the rectum and anus that stops us from pooping, much like a bend in a garden hose stops the flow of water. A squat opens the pipes and frees the flow entirely. That’s why folks often need to push when sitting.”

The moral of the story appears to be thus: If you want to poop efficiently, take a silent squat.