Yes, semen. Several companies are making moisturizing creams with this very unusual ingredient. Semen contains a very powerful antioxidant called spermine. A Scandinavian company called Skinscience makes an entire line of spermine beauty creams and tout the antioxidant as being 30 times stronger than Vitamin E [source: SkinScience]. This means that semen can be used to do everything from moisturizing your skin to healing your sunburn. Not only that, but a bull semen treatment is being used in some hair salons to give your locks some extra shine. Another company called Cmen Beauty Now delivers actual semen to your home in discreet packaging. They maintain that the donors for their product are tested monthly to ensure a safe and quality moisturizer.