Orgasms without sex: Here's how

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.

Now science can help explain some of these and other more unusual ways to orgasm without genital stimulation.

Orgasmic body parts

The mouth

A good makeout session could just be an orgasmic one -- stimulating the lips, tongue and other parts of the mouth can lead to whole body orgasms for some people.

There are women who say they get off just by kissing and others who have had orgasms while giving their partners oral sex.

The mouth is the main sensory organ, so it's no surprise that both men and women can have oral orgasms.

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Both men and women can also have anal orgasms.

Putting a lubricated finger, penis, dildo or even a fist into the anus or rectum can be orgasmic. So can kissing, licking or sucking.

It's the pelvic nerve that's to thank for anal orgasms. Besides the anus, it's also linked to the vagina and when it gets activated, an orgasm is the result.

That's good to know, since touching both the anus and a guy's penis, or a girl's vagina or clitoris, can make orgasms more complex and intense -- which is science speak for mind-blowing.

Some women's breasts and nipples can be so sensitive that touching or kissing them can even be orgasmic.

The breasts share neural pathways with the vagina and other parts of the genitals that lead to a part of the brain involved in an orgasm.

That's why stimulating a woman's nipples can be so pleasurable -- it can have a similar effect on the body as touching her vagina or clitoris.

A neck-shoulder orgasm? That's right, some people even have skin orgasms.

After a spinal cord injury, the skin covering a part of the body can be extremely sensitive and even orgasmic.

One woman able to have skin orgasms got off with a vibrator which she placed between her neck and shoulder. When she orgasmed, she felt a tingling in her vagina.

Interestingly, the same part of the skin that can be so pleasurable when touched the right way can also be very painful when the touch is all wrong.

Sweet dreams can take on a whole new meaning when they're wet dreams, or orgasms that happen during sleep.

For men, wet dreams usually mean coming, whereas for women it's a question of their vaginas getting wet.

Research shows that wet dreams begin in the brain without any stimulation of a guy's penis or a girl's vagina or clitoris, which makes them one of the few kinds of orgasms that can take happen without touching the genitals in any way.