<human>:  Why did the Prussian king Frederick the Great have a bald head?
<bot>: Frederick the Great was bald because he had a dreadful disease called syphilis. Syphilis is a bacterial infection that can cause damage to your skin, bones, brain, and other organs. The disease can be passed from person to person through sexual contact. It can also be passed from mother to child during pregnancy. The disease can be treated with antibiotics, but it can be cured only if the antibiotics are taken in time.