When Cobain was nine years old, his parents divorced. He later said that the divorce had a profound effect on his life, while his mother noted that his personality changed dramatically; Cobain became defiant and withdrawn. In a 1993 interview, he elaborated:
Although uninterested in sports, Cobain was enrolled in a junior high school wrestling team at the insistence of his father. He was a skilled wrestler, but despised the experience. Because of the ridicule he endured from his teammates and coach, he allowed himself to be pinned in an attempt to sadden his father. Later, his father enlisted him in a Little League Baseball team, where Cobain would intentionally strike out to avoid playing. Cobain befriended a gay student at school and suffered bullying from peers who concluded that he was gay. In an interview, he said that he liked being associated with a gay identity because he did not like people, and when they thought he was gay they left him alone. He stated, "I started being really proud of the fact that I was gay even though I wasn't." His friend tried to kiss him and Cobain backed away, explaining to his friend that he was not gay, but remained friends with him. In a 1993 interview with The Advocate, Cobain claimed that he was "gay in spirit" and "probably could be bisexual." He also stated that he used to spray paint "God Is Gay" on pickup trucks in the Aberdeen area. Police records show that Cobain was arrested for spray painting the phrase "ain't got no how watchamacallit" on other vehicles. One of his personal journals states, "I am not gay, although I wish I were, just to piss off homophobes."
The Beatles were an early and lasting influence on Cobain; his aunt Mari remembers him singing "Hey Jude" at the age of two. "My aunts would give me Beatles records," Cobain told Jon Savage in 1993, "so for the most part [I listened to] the Beatles [as a child], and if I was lucky, I'd be able to buy a single." Cobain expressed a particular fondness for John Lennon, whom he called his "idol" in his posthumously released journals, and he said that he wrote the song "About a Girl", from Nirvana's 1989 debut album Bleach, after spending three hours listening to Meet the Beatles!.
After attaining mainstream success, Cobain became a devoted champion of lesser known indie bands, covering songs by The Vaselines, Meat Puppets, Wipers and Fang onstage and/or in the studio, wearing Daniel Johnston T-shirts during photo shoots, having the K Records logo tattooed on his forearm, and enlisting bands like Butthole Surfers, Shonen Knife, Chokebore and Half Japanese along for the In Utero tour in late 1993 and early 1994. Cobain even invited his favorite musicians to perform with him: ex-Germs guitarist Pat Smear joined the band in 1993, and the Meat Puppets appeared onstage during Nirvana's 1993 MTV Unplugged appearance to perform three songs from their second album, Meat Puppets II.
Nirvana's Unplugged set also included renditions of "The Man Who Sold the World," by British rock musician David Bowie, and the American folk song, "Where Did You Sleep Last Night," as adapted by the American folk musician Lead Belly. Cobain introduced the latter by calling Lead Belly his favorite performer, and in a 1993 interview revealed he had been introduced to him from reading the American author William S. Burroughs. "I remember [Burroughs] saying in an interview, 'These new rock'n'roll kids should just throw away their guitars and listen to something with real soul, like Leadbelly,'" Cobain said. "I'd never heard about Leadbelly before so I bought a couple of records, and now he turns out to be my absolute favorite of all time in music. I absolutely love it more than any rock'n'roll I ever heard."
Cobain contributed backing guitar for a spoken word recording of beat poet William S. Burroughs' entitled The "Priest" They Called Him. Cobain regarded Burroughs as a hero. During Nirvana's European tour Cobain kept a copy of Burroughs' Naked Lunch, purchased from a London bookstall. Cobain met with Burroughs at his home in Lawrence, Kansas in October 1993. Burroughs expressed no surprise at Cobain's death: "It wasn't an act of will for Kurt to kill himself. As far as I was concerned, he was dead already."
There are differing accounts of the date that Kurt first met Courtney Love although the actual events remain similar. In his 1993 authorised biography of Nirvana Michael Azerrad cites a January 21, 1989 Dharma Bums gig in Portland where Nirvana played as support, while the Charles R. Cross 2001 Cobain biography has Love and Cobain meeting at the same Satyricon nightclub venue in Portland but a different Nirvana show, January 12, 1990 when both still led ardent underground rock bands. Love made advances, but Cobain was evasive. Early in their interactions, Cobain broke off dates and ignored Love's advances because he was unsure if he wanted a relationship. Cobain noted, "I was determined to be a bachelor for a few months [...] But I knew that I liked Courtney so much right away that it was a really hard struggle to stay away from her for so many months." Love first saw Cobain perform in 1989 at a show in Portland, Oregon. They talked briefly after the show and Love developed a crush on him. Everett True, who was an associate of both Cobain and Love, disputes the earlier versions in his 2006 book, claiming that he himself introduced the couple on 17 May 1991.
Prior to a performance at the New Music Seminar in New York City in July 1993, Cobain suffered another heroin overdose. Rather than calling for an ambulance, Love injected Cobain with naloxone to bring him out of his unconscious state. Cobain proceeded to perform with Nirvana, giving the public every indication that everything was business as usual.