How long have you lived here? http://www.crosscarefoodbank.ie/index.php/research-essay-structure configuration essay sunday launching Now, Sir David Attenborough has provided the obvious answer. In an encounter with the Icelandic singer Björk for a Channel 4 documentary – itself the high-concept product of some fierce blue-sky thinking in the commissioning room, in which envelopes were not just thought outside of but torn up completely – the great naturalist ruminates on the lyrebird, and the capabilities of the human voice, before concluding that the purpose of music is, in large part, sexual. This, he adds, explains why it is quite so popular with those aged between 15 and 30, whose interest in their favourite bands is almost as all-encompassing as their interest in finding a mate.