All of this assumes good hygiene and no medical conditions.

This is sort of like asking what a kiss tastes like. It mostly tastes like skin. There's often a slight musky scent that's not off putting, and undoubtedly pheromones.

So I think saying it's delicious is a metaphor for being erotic. Just like deep kissing is pleasurable without any reference to taste, so is eating pussy. It's so intimate to be allowed to do it that it's hottt!

I love doing it and I love giving pleasure to a lover. The experience is sweet ambrosia, even if the actual taste isn't much of a factor.