What a great insight. I never thought about that before, but when you articulated it, it hit home the way someone "nails" a thought that hasn't been expressed before.
In a related thought, I think this is why alcoholics get caught in chasing the high. There is this memory of fun, or maybe the absence of fun driving us to the next drink, but Dee drove that home by pointing out the difference between fun and chemical euphoria. Except toward the end of my drinking, there was never euphoria, just a vacant dullness, but I did keep chasing the high, anyway.