Iku Iku Byo is a “potentially deadly affliction suffered by women who orgasm constantly”.

“Symptoms of iku iku byo are not pleasurable, they’re torture,” Weekly Playboy quotes a 2005 post on Love Bonita from a woman called Mei, a 27-year-old woman who has offered the public domain’s most detailed description of a Japanese woman with PSAS.

“My body reacts to every movement the train makes and I come any number of times with each ride. I’m exhausted by the time I get to work. I orgasmed when a co-worker tapped me on the shoulder and when the mobile phone in my pocket rang, so I thought I had to do something about it and went to see a doctor. I come every time there’s an earthquake and even the vibrations from the music at karaoke or a nightclub will set me off. I’m terrified just to go outside.”

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