Musical orgasm

Someone out there - music conaisseurs, critics or behavioural therapists - can someone please explain me, how is music made...that it's so powerful? How can there be songs which make me cry, even if i'm not in a sad mood? It can be just one chord of guitar and there i go again, tears flowing.... Or some of them which never fail to make me smile and dance a little? How is it possible that i listen to a beautiful voice and get goose pumps? How can there be such a physical reaction? I've heard of people who've had an orgasm just listening to music. Can that be? I do believe it's not impossible....I'm not sure what i'm saying here...it's just...i'm truly in awe of the people with true musical talent!