How to get rid of fetish?

My girlfriend and i have a puke fetish. Ill sum it up in one sentence because i know that not everyone has a strong stomach like we do. After we have sex, we mutually masturbate while taking turns vomiting into each others mouth back and forth untill we both climax. Turns out we got really sick after a few years of doing this a few times a week. Our stomachs are nearly ruined. Our throats constantly feel as if we swallowed razor blades. We have tried everything from medicine to hypnosis to prayer to try to rid ourselves of this fetish. We realize it is going to be a nearly impossible task, but we value our lives and any suggestions would be great.