I have a feeling that a lot of the common ideas about things you can do to change the taste of your semen are simply urban legend. The chemicals in semen are hardly related to what foods you eat. I'm more tempted to think varieties in flavor are (a) genetic, or (b) related to the exact composition of that ejaculation (depending on frequency of ejaculation, hydration, etc).

I've simply accepted that cum makes me want to vomit, and that does nothing to deter me from swallowing it every time.