Questions regarding life

Well, as you all know we tend to live and not think of death in many of our days. It's a great thing because we are more aware of living than the terminus that expects us all.

These days I started thinking more about life and death, although it appears that not a day goes by without these sort of thought. Anyway in the life category of thoughts are some questions which I would like to address you.

1. Why do they say that when you have flatulence you weigh more? Isn't gas suppose to make you lighter?
I'm still trying to find this out so if you come by a relevant article or piece of information let me know.

2. Why do we all assume that we will live a long healthy life, and forget that we might have to endure a long death(for example suffering from a debilitating disease)?
A possible answer for this might be the optimism we have regarding life, that it won't happen to us, and I believe that the reasoning might use the same principle that we apply everyday: not thinking about our ephemera nature and instead we choose an illusion as if we are suppose to live indefinitely.

Other questions might arise and I will pose them then.

If you have theories, hypothesis or anything related to this topic let me know.