Hippies don't screw in lightbulbs they screw in dirty sleeping bags.
f(x), where f(x) = the optimal number of x for establishing a humorous stereotype.
None, cuz in the end it doesn't even matter!!!
Two.
one, but it takes 32 lightbulbs.
Hippies can't change anything. And they smell bad.
Tell them it will "cleanse toxins."