by Sima Kotecha
Newsbeat US reporter
Newsbeat has been getting up close and personal with a controversial treatment - the G shot - which claims to make women have bigger orgasms.
Robin has received two G shots
The G shot is a collagen injection which is given in the vagina, where the patient's G-spot is. Specialists claim it enlarges the G-spot to the size of a 10p in width and a quarter of an inch in height. It makes the G-spot easier to find and more sensitive, and so could enhance an orgasm.
Some doctors say there's no evidence that it actually works. But we've been talking to a woman who has had the treatment twice and says it's dramatically improved her sex life.
Robin is a New York cop and her boyfriend can't help himself when he sees her in uniform.
"He would want sex and he would enjoy himself completely and I was left feeling like what do I do now," she said.
"I wasn't getting the most out of it, not as much as I'd like to."
Her struggle to climax put pressure on their relationship and often caused arguments. One afternoon while flicking through a magazine, she saw an article on the G shot.
At first she wasn't convinced but after doing some research online, she quickly changed her mind and made the decision to try it out.
Her often "tiny" orgasms were frustrating and she did not want to live with an "OK" sex life. So she booked an appointment to have the jab at a clinic on Fifth Avenue in Manhattan.
Doctor Kevin Jovanovich specialises in the treatment and has had training from its inventor, Doctor David Matlock.
Dr Jovanovich made it clear the treatment is not for women who don't have orgasms.
"It's for women who feel comfortable with themselves and want bigger and better orgasms," he said.
"If you can't climax, you can't have the treatment because you need to know where your G-spot is."
The procedure takes less than an hour in total. This is what happened:
- Robin was put in a patient's room on her own and told to find her G-spot.
- After doing so, she showed Dr Jovanovich where her G-spot was. He then numbed the area with a local anaesthetic.
- She was given the injection in the designated area. It took around eight seconds.
- The doctor then inserted a tampon to stop any bleeding created from the needle.
Around four hours later, she was feeling the effects. Robin was very frisky and couldn't help but think of her boyfriend as she prepared dinner.
"I was in the kitchen cooking and I had a climax," she said. "It was weird. It was like wow, what is this? It's great."
And when her man finally got home, it was straight to the bedroom. She describes her orgasms as "multiple, thrilling, chilling, and mind boggling".
The so-called "party in a needle" costs £800 and lasts for about four months.
Records show the procedure is more popular in the USA than in the UK.
It has been going on for longer in America, with about 40 women a month having it in Los Angeles, compared to five in Britain.
Doctors in Hollywood told Newsbeat three women from England have had the injection there in the last six days.
But not everyone is convinced.
Linda Cardozo is a Professor of Gynaecology at King's College Hospital in London. She's not sure whether a G-spot even exists.
She said: "If there was a G-spot, women who've had surgery on the vaginal wall wouldn't be able to have orgasms and we know that's not true.
"My advice to anyone who's thinking about having the G shot is - a good holiday would be a better use of their money and probably improve their sex lives more."
The side effects can be off-putting. They can include bleeding, blood in the urine, bladder pains, and a sensation of always being sexually aroused.
But Robin has already had her second dosage. And this time round, it was a double shot.
She said: "It's intoxicating. It's almost like you're at a party and you get so drunk someone has to throw you in a car and send you home. You have to sleep it off."