Friends 'liked' her nude photos
The first victim, who wants to be known only as Ellen, did not even find out about it until nearly a week later.
By then, her ex-boyfriend had shared six of her naked photos on his Facebook account. He had more than 300 friends.
The man also tagged her in two of the photos, which made them accessible to her own 250-odd Facebook friends.
Ellen, 23, tells The New Paper on Sunday: "No one alerted me to it and I found out only through the notification after I had logged into my Facebook account.
"About 30 friends had actually liked the photos and not said anything to me.
"I'm not a regular user, so it was quite late by then."
Ellen admits that all the photos were taken with her knowledge.
"They were taken by my ex when we were both still dating and to be honest, I had forgotten all about them," she says.
She and her ex-boyfriend dated for three years before splitting last January.
Ellen had been the one to call off the relationship as she felt that he was too possessive.
"I had to report every moment to him and he would call me at odd times just to check where I was. That irritated me a lot," she says.
"We kept trying to make it work with his constant promises that he would change, but it was still the same after one year."
Fed-up, she suggested that they break up.
A week after her "final decision", he shared Ellen's photos.
After she found out, her mother and elder brother accompanied her to confront the man at his home.
"At first, he kept denying it in front of his parents and two younger sisters," says Ellen.
"In the end, I had no choice but to log into my Facebook account and call up the photos to prove that he was lying.
"I was so embarrassed but I felt I needed to take action before it became worse."
Her ex-boyfriend's father "hammered him in front of us", she recalls.
In the end, the younger man deleted all the photos and even shut down his Facebook account.
She didn't make a police report.
Ellen says: "I chose to move on and forgive him. I also shut down my old Facebook account and opened a new one with a more stringent privacy setting."
She regrets provoking ex-boyfriend
Miss Joan Tan, 29, had taken nude and intimately-posed photos with her former boyfriend of five years.
But in the last year of their relationship, she cheated on him.
Miss Tan, a telemarketing executive, says: "He was hurt and angry when he found out, but he wanted to give our relationship another go.
"But I told him I wanted to break up and I think that hurt him even more."
After trying unsuccessfully to make up, Miss Tan's ex-boyfriend decided to change tack.
He shared photos which they had taken when they were together, uploading two a day.
Miss Tan says: "At first, they were innocent photos and he'd write stuff like, 'I miss our days together'. But I retaliated by putting up photos of my new boyfriend and I on dates."
The revenge, she says, was such a silly move. It provoked him into turning offensive and he started to share the more salacious photos of them together.
He even "marked" dates to reflect that she had been two-timing.
Miss Tan says: "I was shocked. And my new boyfriend was so angry that he broke up with me."
Her own revenge had backfired.
"I wanted to hurt him. He hurt me in return. And another innocent party was also hurt in the process," says Miss Tan.
Her ex-boyfriend removed the photos after he learnt of the break up.
She recalls one line she read in the newspapers on a revenge porn case and quotes Deputy Assistant Commissioner of Police Wilson Lim.
She says: "He advised the public not to put themselves in compromising situations which may make them vulnerable to blackmail.
"All I can say is that he is right."