The Naturism movement of the 20th century claims that being nude is healthy. Starting in 1853, reformer Arnold Rikli said that "Sun- and air-bathing" is a good thing, and that it can only give its full potential when done in the nude. Many of these views have been proved wrong today. Not smoking or drinking alcohol is good for health, regardless of whether clothing is worn or not. People suffering from being exposed too little to the sun will also be so if they are clothed. Wearing wet clothes can lead to cystitis (an infection of the urinary bladder).