Your Sly is slipping. Maybe you are thinking of Oscar Wilde's green carnations. I don't think you got it from a Doctor?
"In the last two decades, researchers have established beyond much doubt that, like high intelligence, green eyes or a propensity for certain diseases, homosexuality runs in some people's genes. Northwestern's J. Michael Bailey, who has conducted much of this research, notes that a male with a gay brother is three to seven times more likely to be gay himself; and a woman with a gay sister is four to eight times likelier to be a lesbian than a female drawn from the broader population."
http://web.csulb.edu/~kmacd/463Gay.html
Of course Green Eyes are a dumb way to measure the talent of people. It makes no sense at all, no more sense than using skin color as criterion to fill a job requirement.
http://newsone.com/1266475/top-10-professions-in-which-blacks-are-still-underrepresented/
Character test, IQ test, and aptitude test work, but have been discredited to favor of different outcomes.