It's an interesting and provocative twist on the old question, "Were you born gay?" And, the shorter answer is, per a great piece in the Atlantic, pretty much so if you are male, but in comfort to Cynthia Nixon and a comeback to her detractors, less so if you are female.
Behind that is the issue of that old fragile Y chromosome and the semi-true factoid that the default human gender is femila.
But, in reality, the issue is more complex, even with men, as "Brokeback Mountain" and ancient Greek pederasty, among other things, illustrate societal, sociologically-driven situational male homosexuality, too.
And, beyond that is plenty of other cultural baggage to unpack.
Give the whole essay a read.