What evidence does McIntosh site regarding the label of homosexual creating the behaviour?

Mary Maclntosh through her work is part of a small body of scholarship that quite literally created a sociology of sexuality.  In the opening sentence in the abstract of her article, “The homosexual role” Maclntosh says

"The current conceptualisation of homosexuality as a condition is a false one, resulting from ethnocentric bias."

Like many of the early attempts by both gender and sexuality scholars recognizing problems with a structural-functionalist approach, McIntosh operates inside of functionalist theory.  McIntosh wrote this essay during a time in which if homosexuality was taught at all in sociology courses, it appeared in courses on deviance.  McIntosh’s work was a small but pivotal example of the kinds of work that have helped to question it’s categorisation as “deviant” in the first place. 

In “The Homosexual Role,” McIntosh sociologically challenges the notion that homosexuality is best understood as a psychological or biological condition.  She aptly notes that one implication of this approach was that “people either have it or do not have it” .  In fact, McIntosh illustrates the ways that treating sexuality as an “it” in the first place is a dangerous game, obscuring important facts and questions.  Thinking of homosexuality as a role, she argued, allowed us to examine precisely when and where it came into existence (along with where it didn’t).  It allows us to consider the fact that sexual behaviors and identities are not always as neatly aligned as some like to assume.  It enabled us to