Why is my vagina sour and how can I fix it?

My vagina has had an unpleasant sour/salty taste for as long as I remember, and I don't know what to do. I've never had anyone complain, but I've tasted it before, during, and after masturbating and I know that it doesn't taste good in any of the stages.

I've tried drinking more water, I've tried cleaning with just water and no soap, I've tried drinking pineapple juice, and I've tried fenugreek. There has never been any change in the taste.

There doesn't seem to be an abnormal smell and the discharge is normal so I don't think it's an infection or anything.

Am I just doomed to a life of nasty snatch?