Pause long and reflect hard. I suppose the reason some people are gay is because of early childhood experiences, also. To make the statement that spanking in childhood causes it to become a sexual fantasy is just plain silly. And, of course, there are those who were never spanked who find it fascinating, such as myself. The people who do find that consensual spanking is erotic are just like everyone else, some were, and some weren't spanked as children.
Fantasies are just that, fantasies, and a way to explore the real world in a safe way.
My ex and I have never spanked our children as a personal choice. We just don't believe in it. Our children are well adjusted, polite, loving, and can be just as annoying at times as any kids. However, I have many friends and acquaintances who do spank and were spanked who are fine, happy, non-violent, successful people who genuinely love their parents, and also have wonderful children. As in every other aspect of our lives, there are those who are perfectly healthy, and far fewer who have serious problems.