I am straight. I cannot remember a time that I was not straight or ever thought I might not be straight. I have had crushes on boys ever since I can remember.
Almost every gay person I have spoken to about this subject has recalled having crushes on members of the same sex since they were 5 or 6. Just like I did as a young hetrosexual girl.
And not all of my gay friends had erections, so they didnt really have to deal with not knowing what to do with it.
God is a loving god. I believe that god created straight and gay people alike. God doesn't make mistakes. God made gay people the way they are. And so be it.