If you’ve been online this week, you’ve probably seen the viral story about a man whose girlfriend was furious when he introduced her to his “Yellow  Pillow.” The man, Cam, didn’t hold back, admitting he owns a severely stained  pillow, sparking a heated debate across social media. Cam’s confession came in a post on X (formerly Twitter), where he shared a photo of the pillow’s intense yellow color, along with the caption: “My girlfriend is upset at me since I disclosed to her The Yellow Pillow. Fellas, I am sure you are all aware that this item is magical.”

The post quickly went viral, leaving people divided. While some found the whole idea of the “Yellow Pillow” unsettling, others resonated with Cam’s unapologetic attachment. In his defense, Cam explained that the yellowed state of the pillow wasn’t intentional, but it has brought him the best sleep he’s ever had. “It’s not my fault the pillow is yellow—it’s what gives me the most peaceful slumber,” he wrote. The debate continued to grow, with commenters choosing sides. Some felt disgusted by the sight of a discolored pillow, while others rallied around Cam, claiming their own “Yellow Pillows” were irreplaceable sleep aids.

One user even admitted that they hadn’t slept well since parting with their own Yellow Pillow, jokingly adding that their life has been “a downward spiral” ever since. Another commenter claimed that having the same unwashed pillow since childhood was practically a badge of honor for men. Whether you find it gross or relatable, the story brings up an important question: why do pillows turn yellow over time?

The primary reason behind the yellowing of pillows is moisture. At the top of the list is sweat. Even if you don’t realize it, you sweat while you sleep, and that sweat seeps into the pillow, gradually staining it yellow. The average person sweats about 200-700 milliliters a night, and that moisture has nowhere to go except into the pillow. Over time, this accumulation creates the yellowish tint that Cam’s post made famous.

But sweat isn’t the only factor causing your pillow to change colors. Natural oils from your skin and hair also contribute to the yellowing process. These oils, along with drool or saliva, can get absorbed into the pillow fibers, making it discolored over time. If you regularly use products like hair oils, lotions, or creams before bed, you’re further increasing the likelihood of your pillow turning yellow. The residue from these products transfers to the pillow during sleep, speeding up the staining process.

So, what can you do to prevent your pillows from becoming like Cam’s infamous “Yellow Pillow”? For starters, wash your pillowcases frequently, as they act as a barrier against oils and moisture. However, just washing the pillowcase isn’t enough. Experts recommend washing the pillow itself every three to six months to remove the accumulated sweat, oils, and bacteria that contribute to the discoloration. Depending on the type of pillow you own, it might be machine-washable or require spot cleaning, so be sure to check the care label.

To maintain a fresher, cleaner pillow, try to go to bed with dry hair, as moisture from wet hair can further contribute to the yellowing. According to Time magazine, this simple step can help keep your pillowcases looking white for longer. Additionally, consider using a  pillow protector or investing in moisture-wicking pillowcases, which are designed to absorb less moisture and reduce staining.

Ultimately, whether you find the “Yellow Pillow” relatable or repulsive, there’s a lesson to be learned about pillow hygiene. For some, a yellowed pillow may be a symbol of comfort and nostalgia, while others may prefer to keep their  pillows as pristine as possible. Either way, understanding why pillows turn yellow can help you make better choices about their care and maintenance. So, if your pillow is starting to resemble Cam’s, it might be time for a good wash or, perhaps, a fresh new start.