Fundamental human characteristic, we want what is impossible always.
This is the source of the unhappiness possibly.
See it например:
Stanislaw Lem:
The Three Electro Knights
Gapless segue of Eric Johnson, Steve Barber, Chris Maresh, Terry Bozzio 'Impressions, Part 1' from the 20041105 bootleg>Jaco Pastorius 'Reza/Giant Steps/Reza' from Invitation.
Complements of Winamp random-play, even. It's a great mix.