Thorn's ethnicity is half Japanese, a quarter Puerto Rican, and a quarter Hawaiian, with her mother and father working as a secretary and in the construction business, respectively. She says she lost her virginity at age fourteen. She grew up in Hawaii and moved to California when she was sixteen.

Thorn's first job was as a promotion and marketing person for a record company when she was fourteen. After she turned eighteen, she began working as a stripper. Shortly afterwards an agent gave her his card. Spurred by this act, Thorn went from dancing to nude modelling, followed by masturbation scenes and later hardcore sex.

Initially she worked an aggressive schedule of film bookings, working every day. She says about that pace "it just killed me" and that she "kept on getting torn and yeast infections." She now limits herself to just five or six shoots a month.

Thorn is a cast member of the Fox Network reality TV show My Bare Lady. She was also briefly featured as a lap dancer in the mainstream Hollywood film, Knocked Up.