Peter, that's simply not true about the piano legs.
They didn’t cover their piano legs because they were sexually suggestive. This myth has a definite literary origin, because it was actually the Victorians who scoffed at the Americans for being so prudish. Captain Frederick Marryat, author of the classic The Children of the New Forest (1847), reported in his Diary in America (1839) that American women disapproved of the word ‘leg’ and insisted that ‘limb’ be used instead. He also ‘unearthed’ the story about the Americans covering piano legs because they were suggestive of naked human legs – but it seems that the American lady he spoke to was pulling his leg, seeing her opportunity to gull a naive English tourist. That hasn’t stopped the myth from being repeated time and time again ever since – not only about the Americans, but about the Victorians too!
http://interestingliterature.wordpress.com/2012/12/26/ten-myths-about-the-victorians/