I don't think anyone believes you can completely get rid of it. You have had years of positive reinforcement, so those attractions can come back. But you can develop new attractions and act on the new attractions. I suppose someone like Tony Robbins could try to make you truely disgusted with women, but you would have to really want to do it.
heterosexual is the structure of your bodies reproductive mechanisms. (the plumbing)
Homosexual is a recreational sex practice.
You can cease conduct, you can't cease your anatomy.