You need some sort of sugars for the yeast to eat.
Have you tried mead (aka honey wine)? It's delicious. And in its simplest form, it's really easy to make. Mix 4 to 5 pounds of honey in warm water, pour into a gallon jug, top off with water, allow to cool, throw in a packet or two of yeast, shake it up, cover lightly with foil (though an airlock would be better), stick in a dark place to ferment (don't jostle it!), and after about six weeks, it's ready to go. You just have to siphon it off to leave any sediment behind. You can optionally add spices (e.g. clove, cinnamon sticks) and/or fruit before fermenting.