Anal orgasms, nipple orgasms, mouth orgasms – the most unexpected body parts can bring some people to a climax.

Others don’t even need to be touched at all to come - they get off in their dreams. And an epileptic seizure can be an orgasmic experience for others. Now science can help explain some of these and other more unusual ways to orgasm without genital stimulation.

More than a quarter of the men surveyed in two recent studies have faked an orgasm at least once. So how do they do it?

People often assume it’s virtually impossible for men to fake orgasms since it means pretending to ejaculate too. Guys were asked to give away their secrets by psychologists at the University of Kansas. Seventy-eight percent said they acted out an orgasm.

“For me, intercourse is a thing of the past.” A comment from a Love Matters reader who blames his sex problems on circumcision.

Circumcised men and their partners have more orgasm trouble, Love Matters reported. In response we received a string of comments from readers who recognised the problem. It’s a hidden complication for cut men, says Dutch expert Gert van Dijk.

Does the G-spot really exist? Of course, says Dutch sex writer Marianne Ras – she can tell you from personal experience.

The G-spot can give most women a more intense sensation than the clitoris, she says. “A vaginal orgasm brought on by stimulation of the G-spot is very intense and can lead some women to ejaculate. This type of orgasm can sometimes be felt days after the sex.”

Women who orgasm through vaginal stimulation get a bigger rush of love for their partners, according to Venezuelan sexologist and psychiatrist Dr Rómulo Aponte. 

Most girl's need clitoral stimulation to climax, but for some just vaginal stimulation will do the trick. The orgasms feel different both physically and emotionally, Dr Aponte says.

The Orgasmic Woman is a self-help programme that can train women to have more sexual pleasure, says its developer, Swiss psychotherapist Annina Sartorius.

She devised the sexuality course together with a tantric guru. It blends yoga exercises and meditation with elements of psychotherapy and hypnotherapy.

Orgasm difficulties are more common among circumcised men and their partners, a recent Danish study found.

Men who’ve been cut were three times more likely to have problems climaxing than men with foreskins intact, says the study’s lead author Morten Frisch. The finding makes awkward news for HIV prevention programmes promoting circumcision.

If you want to make your man happy, kiss, cuddle and caress him more, say US researchers. It’s more important to him than how often he has sex.

Physical intimacy is one of the most important parts of a happy relationship and satisfying sex life for men, the international study on long-term relationships found.