Comic timing

I brought a sample of Sicilian
olive oil to the bike shop
a friend who works there
farms olives in Greece and
i had told her another friend
imports the Sicilian oil
because it is the best she ever tasted
but we did a blind test and
we liked her Greek oil better.
I had a little of the
Sicilian oil in a small
marmalade jar that I placed in my
coat pocket, carefully.
It was yellowish and all
the way to the bike shop
I prepared urine sample jokes
to employ, various jokes
depending on the situation.
She took the jar from me, her
hands covered in grease, and
took a sip before I could
decide on the right joke
The oil tastes old, she said.