A 26-year-old secretary known only as Fiona, has admitted to being a sex addict who used to have sex with strangers every other day, China Press reported.

"I started visiting pornographic websites with my stepbrother when I was 15, and we even had sex," she said in an interview with Singapore's Straits Times.

She said she started having one-night stands with strangers four years ago, but only realised she was suffering from sex addiction when she read an article about the condition recently.

"I began receiving treatment 10 months ago but have not fully recovered.

"Whenever I am stressed or have a fight with my family, the urge will come back, but I try to control it by distracting myself with other activities," she said.