The Girl Who is Allergic to Water-Teenager Ashleigh Morris can't go swimming, soak in a hot bath or enjoy a shower after a stressful day's work - she's allergic to water. Even sweating brings the 19-year-old out in a painful rash. Ashleigh, from Melbourne, Australia, is allergic to water of any temperature, a condition she's lived with since she was 14. She suffers from an extremely rare skin disorder called Aquagenic Urticaria - so unusual that only a handful of cases are documented worldwide.

The Woman Who has 200 Orgasms every day-UK's Sarah Carmen, 24, is a 200-a-day orgasm girl who gets good, good, GOOD vibrations from almost anything. She suffers from Permanent Sexual Arousal Syndrome (PSAS), which increases blood flow to the sex organs. She believes her condition was brought on by the pills. "Within a few weeks I just began to get more and more aroused more and more of the time and I just kept having endless orgasms. It started off in bed where sex sessions would last for hours and my boyfriend would be stunned at how many times I would orgasm. Then it would happen after sex. I'd be thinking about what we'd done in bed and I'd start feeling a bit flushed, then I'd become aroused and climax. In six months I was having 150 orgasms a day—and it has been as many as 200." She and her boyfriend split— and new partners struggle to keep up with her sex demands. "Often, I'll want to wear myself out by having as many orgasms as I can so they stop and I can get some peace," she said.

The Man Who Can't Get Fat-Mr Perry, 59, can eat whatever he likes - including unlimited pies, burgers and desserts - and never get fat. He cannot put on weight because of a condition called lipodystrophy that makes his body rapidly burn fat. He used to be a chubby child, but at age 12 the fat dropped off "almost over night". He initially tried to eat more to gain weight, but it had no effect. Mr Perry, of Ilford in Essex, endured a decade of tests before the illness was diagnosed. It finally emerged that his body produces six times the normal level of insulin. Doctors have admitted that the condition would be a "slimmer's dream"

The Man Who Doesn't Feel Cold-Dutchman Wim Hof, also known as the Iceman, is the man that swam under ice, and stood in bins filled with ice. He climbed the Mt. Blanc in shorts in the icy cold, harvested world records and always stands for new challenges. Scientists can't really explain it, but the 48-year-old Dutchman is able to withstand, and even thrive, in temperatures that could be fatal to the average person.

The Boy Who Couldn’t Sleep: stayed awake 24 hours a day for years-Rhett Lamb is often cranky like any other 3-year-old toddler, but there’s one thing that makes him completely different: he has a rare medical condition in which he can’t sleep a wink. Rhett is awake nearly 24 hours a day, and his condition has baffled his parents and doctors for years. They took clock shifts watching his every sleep-deprived mood to determine what ailed the young boy. After a number of conflicting opinions, Shannon and David Lamb finally learned what was wrong with their child: Doctors diagnosed Rhett with an extremely rare condition called chiari malformation.

The Woman Who Can’t Forget-That's the story of AJ, an extraordinary 40-year-old married woman who remembers everything. McGaugh and fellow UCI researchers Larry Cahill and Elizabeth Parker have been studying the extraordinary case of a person who has "nonstop, uncontrollable and automatic" memory of her personal history and countless public events. If you randomly pick a date from the past 25 years and ask her about it, she’ll usually provide elaborate, verifiable details about what happened to her that day and if there were any significant news events on topics that interested her. She usually also recalls what day of the week it was and what the weather was like.

The Girl Who Eats Only Tic Tacs-Meet Natalie Cooper, a 17-year-old teenager who has a mystery illness that makes her sick every time she eats anything. Well, almost anything. She can eat one thing that doesn’t make her sick: Tic tac mint! For reasons that doctors are unable to explain, Tic Tacs are the only thing she can stomach, meaning she has to get the rest of her sustenance from a specially formulated feed through a tube.

The Musician Who Can't Stop Hiccupping-Chris Sands, 24, from Lincoln, hiccups as often as every two seconds - and sometimes even when he is asleep. He has tried a variety of cures, including hypnosis and yoga, but nothing has worked. Mr Sands thinks his problem stems from an acid reflux condition caused by a damaged valve in his stomach. "If the acid levels are severe enough they are going to do keyhole surgery and grab part of my stomach and wrap it around the valve to tighten it," he said.

The Girl That Collapses Every Time She Laughs-Girl 20, has cataplexy, which means that almost any sort of strong emotion triggers a dramatic weakening of her muscles. Exhilaration, anger, fear, surprise, awe and even embarrassment can also cause sufferers to suddenly collapse on the spot. Kay, of Barrow-upon-Soar, Leicestershire (UK), who was diagnosed with the condition five years ago, once collapsed more than 40 times in a single day. She said: "People find it very odd when it happens, and it isn't always easy to cope with strangers' reactions. "

The Woman Who is Allergic to Modern Technology-The 39-year-old is so sensitive to the electromagnetic field (emf) or 'smog' created by computers, mobile phones, microwave ovens and even some cars, that she develops a painful skin rash and her eyelids swell to three times their size if she goes near them. As a consequence, Mrs Bird, a health spa manager, has transformed her home into an EMF-free zone to try and stay healthy