Personally I dislike body odor less than someone wearing an overpowering amount of cologne. Not that I am a huge fan of body odor.
The less anything smells, the better.
For example, smell can alert you (of gas, of glycerin vs. water in a can, food burning during cooking, etc.). Further, it's not only that food doesn't taste as good, you either have to force yourself to eat (enough), or you eat too much, because the experience is more shallow than you were used too and you try to compensate.