Mormons can't drink coffee because it is prohibited by their religious health code called the "Word of Wisdom." This guidance, given to the Mormon prophet Joseph Smith in the early 1800s, forbids the consumption of "hot drinks," which church leaders interpret specifically as coffee and tea. The prohibition is based on the belief that these drinks are harmful to the body and can be addictive, which conflicts with their emphasis on maintaining physical and spiritual health. Additionally, the prohibition supports their views on abstaining from substances that could undermine reproductive health and overall sobriety. Faithful Mormons who drink coffee typically face restrictions such as being denied participation in certain church ceremonies and losing temple privileges. Interestingly, other caffeinated beverages like soda are allowed, and hot chocolate or herbal teas are permitted as well. The main focus is on avoiding substances that dull the senses or are deemed unhealthy according to their religious teachings.