Change exchange

What would you do,
If you could change anything
I think I would like wings
Just imagine soaring,
Through those marshmallow clouds,
Free from earthly concerns
Able to go wherever there is wind,
And your desire
Or what about having gills,
As well as lungs
Have the means to explore a hidden world
Chance upon lost treasures,
And sunken ships long forgotten
Discover strange and new life
Hmm! In the vein of vanity,
A full head of hair would be nice
To replace what heredity and time have taken
Oh! I think I have my answer
From the smell,
It will have to be my son’s diaper