Comment Re:How come the water don't smell like coffee? (Score 4, Interesting) 294
While tea does contain tanin so does coffee. A more common reason as to why you can do this is either you're drinking a fruit /mint tea that has little to no caffeine, or more likely, your body is conditioned for coffee so that when you smell coffee and taste it your brain behaves as though it's just waking up even if there's not a lot of caffine in the cup. An example of this was a study (in england around 2011 if my memory serves) that had people drink regular coffee and decaf and then tested focus and reaction time. The people drinking decaf who were told they were drinking caffeine actually did better than the caffeinated people on (I think just on) reaction time.
The brain is an annoyingly inconvenient trickster sometimes.