Why we smile

Does anybody know why we smile?
I tell you why, well..... ill try
try to explain the fundamentals of this
but first.... let me take a piss.

we smile because were happy
we smile because our baby has a clean nappy
sometimes we feel warm in the heart
but mostly its because were straining to fart

a smile can brighten up your day
but dont smile at him, he thinks your gay!
dont judge me by what i write here
im such a happy person, im not queer

i just want to explain why we smile
smiling makes others happy, and thats worthwhile
it takes 12 muscles to smile, 11 to frown
thats why lazy people are always down

Chavs dont smile, its bad for their health
but businessmen smile, its good for their wealth
we all have to smile be happy and cheery
thats the way of life! well...in theory