Understanding the rules

Let’s start with a white they always come first
You use all the senses, excepting a thirst. 
The colours important you look with the eye
And then it's the nose. I don't know why
The smell of the grape the whiff the vine
I'm drinking yours and I think she's got mine

“What are you tasting?” the connoisseur said
“I'm guessing the colour I think it is red”
Look at the colour and then swirl the glass 
Is it quite noble does it have class
I don’t like the red it’s making me queasy
I thought this tasting of wine would be easy

It rolls round the teeth and tickles the tongue
I can still taste it now, the finish is long
These technical terms are used to impress
I drank all of mine and now I'm a mess
The sommelier asked “What I was getting”
“Pissed” I replied which he found upsetting

An afternoon wasted it seems not quite right
The red's not for me should I stick to the white?
It was suggested politely that I leave the cellar
You’re not our sort you ignorant fellah.
I accepted the invite which I thought was kind
Without knowing the rules I was left blind