Very few people used fundoshi in general pools where fundoshi had been in common use before, and a myth spread that fundoshi was prohibited at pools when some pools started to prohibit fundoshi which was confusingly similar to underwear as well as trunk-type swimwear with pockets.
褌が普通に散見された一般のプールでも褌の利用者がほとんど見られなくなり、一部のプールではポケットのついたトランクス水着や下着と紛らわしい褌を禁じるプールも出現し、プールで褌は禁止されているとの誤解が広まった。