Tiger Woods tees off from the 4th hole during the final round of the WGC - Cadillac Championship golf tournament at TPC Blue Monster at Trump National Doral in this file photo taken in Miami, Florida March 9, 2014. Woods has ruled himself out of next mont
Woods sits at the sixth place with $61.2 million earnings. A large portion of his earnings came from endorsements. He made $55 million just from his sponsors alone. In 2000, Woods has signed a five-year contract extension with Nike worth $ 105 million. REUTERS

"Consuming pornography does not lead to more sex, it leads to more porn. Much like eating McDonalds everyday will accustom you to food that (although enjoyable) is essentially not food, pornography conditions the consumer to being satisfied with an impression of extreme sex rather than the real". -- Virginie Despentes

Intensive research and clinical trials show that pornography is a 'chemical addiction' that produces a response similar to street drugs. Pornography taps into emotional, biological and chemical links through the entire body. Its goal is to excite the naturally built-in desires and urges.

According to Net Nanny, during sex, the brain starts focusing on releasing endorphins and neurochemicals like dopamine and oxytocin. When this is released during pornography use or any such sexual addiction behaviours, it is called "the fearsome four" as it produces severe addiction and negative consequences. Porn is also called substance abuse that triggers neurochemical release, which is considered the most powerful drug.

There are several celebrities who have either admitted to being porn addicts or have been exposed. Here is a look at a list of the celebrity porn addicts, according to Celebrific.

Tiger Woods

Tiger Woods' addiction to sex and porn led to the destruction of his marriage as well as a decline in his career. His ex-swing coach calls him a "lover of pornography."

Cameron Diaz

On Jimmy Kimmel's show, Cameron Diaz admitted to being a porn addict. Usually, not many women admit being porn addicts as it puts them into a different stereotype than the men who admit to it, but Diaz was very open about it.

Mel Gibson

Mel Gibson had developed a fetish foot while filming and a reporter, Rick Wedge said that Mel spent hours downloading pictures of naked female feet and he would carry his laptop everywhere to satisfy his addiction.

Kanye West

Kanye West was open about watching his better half, Kim Kardashian, in action before having sex with his exes. He boasts of "smashing" porn stars. His mother, in a memoir, wrote that she caught Kanye watching porn on several occasions when he was young.

Charlie Sheen

Charlie Sheen's addiction to porn got a lot of attention after his second wife, Denise Richards, posted details of it on the internet. She wrote that he was unwilling to give up his porn addiction, which included porn with very young girls and gays.