I've had several surgeries, but if you want a story:
Two years ago I get my wisdom teeth out. Either I'm an amazing healer or the doctor did an amazing job (probably the latter), but either way for some reason I have no pain whatsoever. Seriously, none. I almost went to work that day, I felt completely fine.
Even though I have no pain at all, I still receive the standard perscription of Percocet. My wife - being a nurse and sortof a Nazi when it comes to taking the full course of medication perscribed by a doctor - insists that to be safe, I take the pills as described.
What's that called when you take narcotics when you don't need them? Oh right, getting high.
I spent four straight days high as a kite on Oxy, and I think I developed a mild addiction as a result. I haven't used it since, but to this day whenever someone mentions the drug I get fond flashbacks and kinda wish I had some.