Are you saying you can't hallucinataste chocolate? The soft melting of a piece of milka, the soft stickiness of your tongue against your teeth, the feeling in your throat, and of course, the sweet cacao taste on your tongue? I don't know why, but if I think really hard about it, I can actually vividly imagine the experience of eating chocolate, but I can't have any other flavour in my mouth at that time. I can mix it with other imaginary flavours though, which is why i roughly know how a sauerkraut hot dog tastes despite not having eaten one ever. (Sauerkraut ufm wurstbrötl? Sapperlot no ma!)

One really curious thing that happens to me though is that when I smoke and smoke gets into my nose, the burn in my nose might trigger one of my taste memories, leading to me tasting some random thing in my mouth, from Apple Juice to seared steak. I do get some weird stares though when I suddenly say that taste out loud.