Does floating stool mean high metabolism?

My stool has started floating recently. What could be the reason? I have always been quite skinny, so I guess I have fairly high metabolism. Recently, I have been hearing about all types of illnesses that cause floating stool so I am getting really anxious. Do I have a disease or it is like my body just process things so fast that fat and fiber aren’t absorbed into my body? What can be the reason behind this?