Bananas - The Secret to Adding Body to Thinner Fruit Wines?

Recently Ive been reading some wine recipes from Wine Maker Magazine, as one of their new articles is going over making fruit wines. Ive noticed all of the recipes call for 1Lb of banana when making an amount of a gallon or so. I can only assume this purpose is to add some body to the wine? I am going to research this and see if this is indeed the case. I am going to try this in my new batches of blueberry, strawberry and raspberry this summer to see if it does indeed help with overall flavor and body of the wine. I will keep you posted!