Manuel Rodriguez, better known as Spain or Spain Rodriguez, was an American underground cartoonist who created the character Trashman. His experiences on the road with the motorcycle club, the Road Vultures M.C., provided inspiration for his work, as did his left-wing politics. Strongly influenced by 1950s EC Comics illustrator Wally Wood, Spain pushed Wood's sharp, crisp black shadows and hard-edged black outlines into a more simplified, stylized direction. His work also extended the eroticism of Wood's female characters.

Underground comix are small press or self-published comic books that are often socially relevant or satirical in nature. They differ from mainstream comics in depicting content forbidden to mainstream publications by the Comics Code Authority, including explicit drug use, sexuality, and violence. They were most popular in the United States in the late 1960s and 1970s, and in the United Kingdom in the 1970s.