A flashback episode shows when Fez first meets the others. They rescue him from a janitor's closet where several bullies had hung him on a coathook. The bullies had asked him if he wanted to hang out, he tells the gang he "shouldn't have said yes." Moments later he states his real name, which is drowned out by a long, ringing school bell. Hyde says "Ok, I'm not gonna remember that." What Valderrama was actually saying was the first names of the main actors who appear in the show. The only known fact about his name is, as he states in the episode "Killer Queen", the first five K's of his last name are silent. He once talked about how he would study in America so he could become a dictator in his homeland "The beautiful island of..." he couldn't finish because he was broken off.
The reason that Fez's name and country of origin are never mentioned throughout the course of the series is that the creators could never decide on his origins, and eventually decided to leave it a secret. In an interview, Wilmer said he created an accent so no one would know what country he is from. Many theories on the homeland of Fez have been produced by fans of the show, but since there is no answer that the creators can provide, it will not be known if these are true.
Fez he exclaimed and lied that he had "Jamaican fire," because he is atright spanish but it turned out that was just the name of his cologne. Fez has also been shown to speak Spanish in an episode when he sang a Spanish love song to Jackie, Besame Mucho but he may have only known the words and how to sing it correctly, he also said it was the lyrics to his school song. Also, Fez once claimed his country has never fought a war, thus ruling out all the countries because all of South America has fought a war. In another episode, however, he alludes to the fact that his country "won the war" against Britain. He once said that his forefathers were not Mayan. He once stated that his country has "more lizards than people." In episode 507, Hot Dog, Fez remarked that his people "eat bugs." He has also referred to having a sister who lives in the jungle 10,000 miles from Wisconsin in "Surprise, Surprise" but it is possible that 10,000 was just a ballpark figure. Also during a ski trip with friends, he marvels at the sight of snow, claiming he had never seen any before then. In another instance, a friend from his home country visits, and has a heavy English accent. Fez' explanation to this is that his friend is from the west side of the island. Another episode had Fez pointing out his island on a wall map. However, the audience's view was blocked by someone's head. After Eric offers him a chance to attend a Styx concert with him, Fez states that "where I come from we have a saying, 'Ugh, Styx.'"
He also stated in one episode that he is from the opposite side of the world. In episode 199, "Love of My Life," Fez states he is going back to Brazil, but then says that he is only going there to take a plane to his country. At the end of that episode, Fez' country origin "Depended on whether you ask the British or the Dutch." The British hated them and would not answer such a question, and nobody can understand the Dutch's answer. Fez also said "Merengue" that's the Dominican Republic national music when he was dancing with Jackie.
Although there's no definitive answer given in the show, it would make sense that Fez is actually from Indonesia, a jungle-rich island chain 10,000 miles from Wisconsin which has been ruled by both the United Kingdom and the Netherlands.
Fez' last real attempt to win Jackie over was in the episode "Ice Shack." Fez carefully planned for Kelso to look bad in front of Jackie so that she would realize that he was the man for her. However, his plan backfired and Jackie easily chose Kelso over him. This caused his obsession over her to wane over the next few years. In season eight, Jackie moved in with him after Kelso left for Chicago, adding a new dynamic to their relationship. After the two moved in together, Jackie began to develop feelings for Fez, and eventually told him about how she felt with a kiss. However, Fez refused her advances, saying that she had already dated Kelso and Hyde and did not want to be her "sloppy thirds."
After being turned down by Fez, Jackie decided to get revenge. She flushed his toothbrush, microwaved his lotion, and ruined his car with graffiti and in an attempt to get back at her, Fez dyed her hair green. He later said that she was now ugly on the outside like she was on the inside. Hurt by Fez's words, Jackie decided to move out. Realizing he wanted to be with her, Fez went to apologize but she was too hurt to accept his apology. They eventually reconciled, and in the final episode, Fez and Jackie finally did get together and kissed atop the water tower.
Besides his love for candy, pornography and masturbation others have been:
"Big Rhonda," a heavyset girl with whom Fez was constantly attempting to lose his virginity. One of his catch phrases was "I'm going to do eettt." Or alternatively, "We're going to do eettt."
Fez once mentioned an intense love for the book "Superfudge," which he claimed to read once a month (even though the book was first published in 1980).
Another short relationship he had was with a girl from school named Caroline, whom Donna had set up with Fez. They shared a few love-filled months together until Fez realized that Caroline was obsessed with him and also mentally unstable. Others realized she was nuts before he did, and he didn't listen at first. She revealed to Hyde that in order to simulate the pain of him leaving her, she would choke herself into unconsciousness. She snapped on Donna and Jackie after Jackie revealed the she kissed Fez once, but it was nothing and his crush on her sparked it. Caroline told the two if they ever touched Fez, she would kill them. While Fez and Caroline were kissing, Donna and Jackie each placed a hand on Fez's leg, causing her to snap and scream at them. Fez then broke up with her, lying that he and Donna were in love so as not to make Caroline think he ended the relationship because she was crazy. Caroline later returned intent on winning Fez back. She snapped on Fez again after finding out that Jackie was his roommate and that he inadvertently had naked pictures of Donna.
Fez often spoke fondly of Donna, though there is no evidence of feelings for her deeper than sexual attraction. He repeatedly hid in her closet and on another occasion took photos of her in her schoolgirl outfit. By season eight it became clear that Fez' attraction for Donna was purely admiration of her beauty and nothing more.
Eventually, Fez got a job at the DMV where he seduced his coworker Nina (Joanna Canton). The two had sex, finally ending Fez's agonizing life as a virgin. But, as Fez recounted, it was not a magical moment; there was no soft music "like in the movies so I had to hum" - Nina had asked Fez to stop humming but he started again without realizing it. There were then some sounds that "were certainly not applause." The night ended with him sneaking out of Nina's bathroom window, but he forgot his underwear on the floor. Nina did give Fez a second chance but it didn't work. He eventually proved too needy for her, and while he proved he was able to conquer this, he decided not to do it anyway and claimed "there is only one Fez, and that is a Fez with needs."
Near the end of the fifth season, Fez was arrested for vandalism of the town's water tower and came close to being deported back to his native country. But at the last moment, Laurie Forman slept with Fez and subsequently married him so he could stay in America. Red suffered a heart attack upon learning this. Their marriage was clearly not one of love, as Laurie went on their honeymoon to Cancún with someone else. Since Laurie's disappearance, Fez stopped mentioning he was married and was referred to as being married only once, by Kelso.
In season seven, Fez got considerably more female attention when he began working at a hair salon, and by season eight, he had been known for having one-night-stands every day of the week including one with a character named Danielle, played by Lindsay Lohan (notable because he stole her from Kelso).