Does coffee really perculate your brain to think of ideas?

coffee doesn't make you think of things but it does stimulate your brain. the problem is that with heavy coffee drinkers it just makes them think nroamlly. lets say that noramally your brain operates at 70%( i know thats not right but lets just pretend) for a non coffee drinker. then when you drink coffee your brain goes to 90 percent. a coffee drinker when their not drinking coffees brian activity is much less then the nromal person so it's more like 50 or 60 percent and when they drink coffee it merely brings there brain activity to a noramly level, in this that would be 70%