Masuli:
I think when your belly is growing, first thing that you lose sight of when standing down is your toes, after that feet and last come erect penis.
Before your belly covers the sight of your dick, it forces your fupa downwards. That's what makes your dick disappear. It becomes swaddled in pubic fat, then that grows, covering more and more until the head barely sticks out. Then even that is swallowed.