|I don't know who they are, but despite appearances, they are probably having a good time.|
Smell it, swirl it around a bit, smell it again, then taste it. Suck in some air through the sides of your mouth to let it emulsify, and think about it—here are some tasting terms to consider. Note the initial, middle, and finishing flavors. Maybe jot down some notes. Swallow, and feel the peppery burn that often accompanies a good oil when tasted solo.
I like to take sips of room-temperature water or lightly-brewed green tea, and maybe a bit of Granny Smith apple between tastings to cleanse the palate. An advanced palate will be able to pick out flavors and terriors in a way that is very similar to a sommelier, so don't under estimate the process!
When you’re all done, pull out the supermarket EVOO in the clear plastic bottle and take a sip.
Notice anything different?