RIDDLE ME THIS

I’m brown. Like chocolate. Like your hair. And eyes. If you happen to have brown hair and eyes, of course. I’m brown like the trunk of that tree. I’m denser than water. I dissolve in it like Alka Seltzer. I’m not quite as fizzy, though. I’m not fizzy at all. I don’t dissolve as fast either. Oh and I don’t fix your stomach when it feels bad. Well… actually, I do. My irregular shape amuses me. How can you have created such awesome form? Makes me see you like an artist. A sculptress. Or a sculptor, if you’re a boy. Sometimes I feel like some sort of… mist. Maybe it’s because sometimes, most times, you feel me as a warm and cloudy and smelly fog. Did you guess who I am?