I don't care what people think of me, but I don't want a gay son
Is that really a problem for you? What's wrong with having a gay son?
I think being gay is wrong.
You really should love your son no matter what. It's wrong to think badly of gay people.
I want to change his sexual preference.
Well that's something that's just not possible. You should meet up with some other parent's of gay children. You might start to come around after hearing some of their stories.