Long, hot showers can help soothe your muscles, help you relax, and improve circulation. While these are great benefits to a hot shower, it is not beneficial to your pipes. Without proper ventilation, hot showers can induce the growth of mold in every crevice of your bathroom. A lack of oxygen in your pipes helps prevent the growth of mold significantly, but not entirely. Mold spreads easily, and your bathroom is a breeding ground for it! Try to remember the proper ventilation and take shorter showers.