People are in such denial that sexual orientation is a choice.  Every day, people like you and me wake up and wrestle with the critical choice: "Should I be straight or gay today?"  We ponder and ponder because it's something that could go either way, sort of like choosing between strawberry jam and orange marmalade for our toast.  

Unlike sexual orientation, toast topping is an easy choice for me.   What is wrong with those orange marmalade people?  There was none of that in my house growing up, and I turned out fine!  Those people are making the wrong choice, and they'll have to live with the consequences.