The 'What Breast Milk Ducts Look Like' meme originated in April 2019 when a Twitter user shared an anatomical illustration of the human female breast, revealing that milk ducts are arranged in a pattern resembling flower petals. The image quickly went viral, sparking a massive wave of reactions ranging from awe to 'trypophobia' induced discomfort. It became a popular meme template used to describe the shock of learning a biological fact that looks nothing like what people expected. Today, it is frequently used on social media to represent moments of sudden, unsettling realization or to joke about the hidden complexities of the human body.