nostr:npub19h7xd9z6skalpk053rqenfaqf6edljm7dj4s77kyf7xw05xvpz6slayzzp 

Its actually simple to understand... Fat floats, pour oil on water or put a stick of butter in water and see...

Muscle sinks and is denser than water.

The fatter you are the harder it is to sink... I am fat, I do not sink.