Research has confirmed that male homosexuality is at least partly hereditary – it tends to cluster in families, and identical twin brothers of gay men are more likely to be gay than fraternal twin brothers, who do not share identical DNA.Īdditionally, there is less discrimination against fa'afafine, compared with the still-widespread homophobia that exists in many Western societies. A new study found that homosexual men may be predisposed to nurture their nieces and nephews as a way of helping to ensure their own genes get passed down to the next generation. Maybe everyone could use a gay uncle twink.