The adult film industry certainly has its highs and lows. On the plus side - constant boning. On the minus side - constant boning. And there is the stigma attached to adult films, which can lead to negative repercussions in later life, and if you want a successful mainstream showbiz career, it's almost impossible.

For every success story like Traci Lords, there are dozens of adult film actors who were never given the chance to spread their wings in Hollywood.

Today is Jeff Stryker's birthday, so let's take a look at him, and seven other adult stars who have tried to make that mainstream crossover.

Charles Casper Peyton

ADULT FILM NAME: Jeff Stryker

AGE: 51? 52? 53?

BEST KNOWN ADULT FILMS: Stryker Force, Busted, Santa’s Cummin’, Bigger Than Life

MAINSTREAM CAREER: Can I Be Your Bratwurst Please, Dirty Love, After Death: Zombi 4

One of the greatest superstars in the history of adult films (John Waters called him the "Cary Grant of porn"), Jeff has branched out occasionally in his career, including the short filmCan I Be Your Bratwurst Please, a country music CD, and the splatter epic After Death: Zombi 4

And here, presented without comment, is "Pop You In The Pooper."

Sean Paul Lockhart

ADULT FILM NAME: Brent Corrigan

AGE: 28

BEST KNOWN ADULT FILMS: The Velvet Mafia, The Porne Ultimatum, Getting Levi's Johnson, The Twin Dicks Of Hazzard

MAINSTREAM CAREER:The Big Gay Musical, Another Gay Sequel, Judas Kiss, Chillerama, Triple Crossed, The Dark Place, Kissing Darkness, High School Musical

As Brent Corrigan, he used his youthful exuberance and undeniable resemblance to Zac Efron to become one of the most popular adult film stars of his generation. He began to branch out into mainstream films with a role as "Stan The Merman" in 2008's Another Gay Sequel and a bit part in Milk.

That led to bigger roles in The Big Gay Musical and starring roles in Judas Kiss, Truth, Kissing Darkness and Triple Crossed (which he also directed). He has been back to adult films, but continues his mainstream success. Here's the trailer for his 2014 film The Dark Place

Dylan Vox

ADULT FILM NAME: Brad Benton

AGE: 36

BEST KNOWN ADULT FILMS: My Overstuffed Jeans, Desperate Husbands, Sexual Urban Legends, Deep South: The Big And The Easy

MAINSTREAM CAREER: Dante's Cove, The Liar, Battle Of Los Angeles, Mega Shark vs. Crocosaurus, Apocalypse Pompeii, Super Cyclone, Titanic II, Virus X, Hercules Reborn, Jersey Shore Shark Attack

Starting in 2001, Dylan (as Brad Benton) spent five years in adult films, but he's managed prolonged success outside adult films in "B" movies (anyone who loves Syfy Channel movies knows who he is), as well as starring in the Here! series Dante's Cove and The Lair. Here's his mainstream reel.

François Sagat

ADULT FILM NAME: Azzedine, François Sagat

AGE: 36

BEST KNOWN ADULT FILMS: Humping Iron, Alpha: Centurion Muscle II, Arabesque, Hole Sweet Hole, Escape From San Francisco, François Sagat's Incubus

MAINSTREAM CAREER: Saw VI, L.A. Zombie, Man At Bath, Multinauts

Francois began his career in modeling, and segued into adult films, where he became one of the biggest stars of the mid-2000's, using his brawn and his trademark scalp tattoo to stand out. He announced his retirement from adult films in 2013, and announced his own clothing line, KICKSAGAT.

Glenn Soukesian

ADULT FILM NAME: Colton Ford

AGE: 52

BEST KNOWN ADULT FILMS: Gang Bang Cafe, Head Games, Aftershock, Conquered

MAINSTREAM CAREER: The Lair, Another Gay Sequel: Gays Gone Wild!, The Next Best Thing

Colton's adult film career was brief, but memorable, which he used a springboard for his true passion, music. Colton has released numerous studio albums, and his singles have been club hits worldwide. Here is "All My Love" from last year's album The Way I Am.

Gregory Grove

ADULT FILM NAME: Matthew Rush

AGE: 42

BEST KNOWN ADULT FILMS: Whorrey Potter And The Sorcerer's Balls, Aftershock, The Velvet Mafia

MAINSTREAM CAREER: Third Man Out, Another Gay Movie, L.A. Zombie

Matthew has been acting in adult films since 2001 (his retirement from adult films in 2011 lasted three months), but he has branched out into mainstream films, performed onstage in such hits as Psycho Beach party, and competed in the Gay Games in Amsterdam and Sydney Australia.

Oh, and his character in Whorrey Potter And The Sorcerer's Balls? Voldemorecock.

Here is Matthew with Brent Corrigan in How To Use A Condom.

Dennis Parker

ADULT FILM NAME: Wade Nichols

AGE: Died January 28, 1985 (aged 38)

BEST KNOWN ADULT FILMS: Boynapped, Captain Lust, Maraschino Cherry

MAINSTREAM CAREER: Edge Of Night

Dennis Parker starred as Wade Nichols in a slew of adult films starting in the mid-70's, but in 1979 cut the fabulous disco record Like An Eagle with Village People producer Jacques Morali

But his biggest mainstream claim to fame was as Police Chief Derek Mallory on the ABC soap opera Edge Of Night, in which he starred from 1979-1984.

John Calvin Culver

ADULT FILM NAME: Casey Donovan

AGE: Died August 10, 1987 (aged 43)

BEST KNOWN ADULT FILMS: Boys In The Sand, L. A. Tool & Die, The Opening Of Misty Beethoven, The Other Side Of Aspen

MAINSTREAM CAREER: Ginger, Score, The Ritz, Captain Brassbound's Conversion

Casey Donovan starred in one of the most iconic gay adult films of all time, 1971's Boys In The Sand, and went on to appear in numerous x-rated films for the next decade.

But he also branched out into the more mainstream (albeit still softcore) fare Score and Ginger, but had his greatest mainstream success on stage. In 1972 he starred in the Broadway revival of Captain Brassbound's Conversion with Ingrid Bergman, who described him as "having the same kind and as much charisma as Robert Redford."

Other stage performances include The Merchant Of Venice and producing and starring in the 1983 Broadway revival of The Ritz.