The researchers found same-sex behaviour in males was 6.4 per cent heritable, the first evidence of homosexuality being genetic in primates.
Strict homosexuality is, of course, not directly heritable (although there’s always that argument aht gay uncles provides some benefit).
But this 6.4%. In this field is that a big number or not? Compared to, say, blue, brown eyes? Or height. Or, that thing we keep being told isn’t heritable, intelligence?