When desire is combined with the knowing you can have what you want, it is 'pure desire' .. it is delicious.
When desire is combined with thinking you can't have it, it's harsh. Those that say they don't want anything .. it's mainly because desire is combined with not knowing how to get what they want or thinking they have to do things they don't like to get what they want ... and therefore associated with pain and dissapointment.
Off topic - check out the pets forum, Baboo now has a little friend!