Curiosity.

Curiosity killed the cat...

Curiosity burned the hand...

Curiosity scalded the finger...

Thus, making a rational deduction, Curiosity was never meant to end up with smth good. Curiosity was to end with a grave reminder that whatever it was that aroused that particular feeling was not smth that one wud wanna have. Well, out of THIS particular Curiosity came smth dat was fairly borderline.

Addiction.

Addiction to alcohol...

Addiction to smoking...

Addiction to drugs...

Addiction