Cheryl Cohen Greene is a sex surrogate who says she has sex with clients for therapeutic reasons. A new film about her life called “The Surrogate” received rave reviews at Sundance.

But does a sex surrogate really help people become more comfortable with their sexuality?

Some mental health experts say Green’s work does more harm than good. Tonight, Dr. Drew explores why people seek therapy with a professional sex surrogate.

Plus Kyle Richards talks about what happens when cameras are not rolling on the "Real Housewives of Beverly Hills."

And, E. J. Scott has lost 80-percent of his vision, but is running marathons for a good cause. He'll tell his story tonight.

It all happens tonight at 9 p.m. ET/6 p.m. PT. on HLN.

All week long, HLN's Dr. Drew has been coordinating with a team of experts searching for answers for a group teenage girls suffering from the same mysterious illness that's causing Tourette-like outbursts, twitching and uncontrollable movements.

Parents of six of the girls from LeRoy Junior-Senior High School in New York met this past weekend and agreed they want some sort of cohesive team, perhaps one physician, who has expertise in this area.

However, tension continues to grow as different specialists disagree on the possible causes of this condition.

The New York State Department of Health say they have been investigating the case apparently for more than three months and found no cause for the illness.

“What we want to do is to put together support for the best treatment possible for the girls … I think if we can get the girls into the right kind of routine … with a little more support and focus, we have a real avenue of hope,” psychiatrist Dr. John Sharp told Dr. Drew Wednesday night.

Some doctors initially believed the diagnosis was conversion disorder.

“A conversion disorder is a condition you show psychological stress in physical ways to describe a health problem that starts as a mental or emotional crisis, a scary or stressful incident of some kind, and converts to physical problems,” Dr. Drew explained.

Dr. Laszlo Metchtler of the Dent Neurologic Institute, who diagnosed some of these girls with conversion added, “What shocked us was that in the following two, three months, then further patients started showing up to our office after being evaluated in the region and at that time our evaluation went from conversion disorder to mass psychogenic illness."

Hear the doctors describe other possibilities that may be causing the girls’ illness in the video clip above.

Watch Dr. Drew weeknights at 9 p.m. ET/6 p.m. PT on HLN and follow the show on Twitter @DrDrewHLN.

Demi Moore is seeking “professional assistance to treat her exhaustion and improve her overall health," her rep Carrie Gordon told HLN this week.

“That's spin - nothing more than spin,” Dr. Drew said Wednesday night. “I have a stronger word for that, but not able to say it on television. I'm sick and tired of reps shooting things out that don't make sense. Exhaustion isn't a diagnosis that requires hospitalization."

John Schwarzlose, CEO of the Betty Ford Center, told Dr. Drew that “What I see - someone finally making a call for help - which as you know takes a lot of courage to ask for help."

Dr. Drew added, “Treatment works, and I hope she engages in that treatment.”

Moore split from her husband Ashton Kutcher after six years. Do you think the stress of the situation precipitated what we're seeing now? Let us know in the comment section below.

Watch Dr. Drew weeknights at 9 p.m. ET/6 p.m. PT on HLN and follow the show on Twitter @DrDrewHLN.

Mothers of New York teens with a mystery illness speak to HLN's Dr. Drew about their daughters' condition.