How often do you fantasize/daydream/imagine/envision throughout your day?
How vivid are these images?
Do you find these images to be out of your reach, or even far fetched?
Do these images give you hope or despair (a sense of hopelessness)?
It doesn't necessarily have to be sexual, but instead based on aspiration or affinity; Desire for something that is not within your grasp or control.
Yearning for love can be the keyword to get people going.