A gamer
superstition. The Desire Sensor detects what rare item, or event you are farming for, and prevents the game from
giving it to you. Only when you
forget about it, or no longer need it will the item drop, or event happen.
"
Holy shit the Godsword Dropped!
I remember running this dungeon for months, and I never got this damn thing.
Of course now its worthless. Friggin Desire Sensor, why do you tease me so."
-MMO player's lament