Responses
He'd been abused his entire life and latched onto that man, because he was the first person to ever show him affection. Now, she was the first person to show him affection. He's starved for love and was willing to latch onto whoever first showed it to him.
Also, gay and straight are not the only two sexualities.
How did she change his whole sexuality??????? I mean... I don't think that's hoe it works Σ(  ̄□ ̄||)