Good list...
Physiologically, any chemical that enters our body usually ends up partially excreted somewhere. A lot of them come out in sweat, urine, sexual juices. I have been told that it is possible to determine my blood sugar (I am diabetic) from my 'taste'. Thats the only food - sexual juice connection that I have personally experienced.
The vagina may be cleaner than the rest of the body normally but it still gets smelly and sweaty down there and that can affect the smell/taste. I have only once been with a woman who hadn't washed recently and the difference was astounding.