Wikipedia: to clap “Clapoire” is found in English as clap by the 1560s. Some people say it came from an (un-evidenced) medieval practice of clapping one’s genitalia with the hands or another object to reduce the pain of swelling and somehow cure the disease. Uh, OK. The clap then became commonly associated with US soldiers contracting STDs overseas during World Wars I and II.
Wikipedia: to clap “Clapoire” is found in English as clap by the 1560s. Some people say it came from an (un-evidenced) medieval practice of clapping one’s genitalia with the hands or another object to reduce the pain of swelling and somehow cure the disease. Uh, OK. The clap then became commonly associated with US soldiers contracting STDs overseas during World Wars I and II.