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The tale of a god who takes a girl to live with him (while he remains invisible) utilizes some classic and powerful motifs, including--most obviously--those found in captivity narratives. Some common captivity motifs include (1) children abducted by robbers or fairies; (2) people taken to underground or fairy kingdoms; (3) captive and captor becoming friends.
Call it Stockholm Syndrome if it makes you feel better--the tropes of captivity narratives are powerful stuff in large part because they address liminality, what happens at the edges of society when people meet and change or compromise.
Cupid & Psyche (or Eros & Psyche) inspired Beauty & the Beast, which by itself inspired generations of writers. The original tale also inspired books of its own, including C.S. Lewis's Till We Have Faces and Shimmering Splendor by Roberta Gillis.
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Stephen King argues that horror movies keep the "alligators" of our id under control--and control is the point. The passion, intensity, and warning system of the id is useful. That doesn't mean we want to live in the sewers.
Likewise Eros, without Psyche, is mere boring anarchy, accomplishing nothing in his rush after sensation. But without Eros, raw energy, mystique, and desire are lost.
In the end, Eros and Psyche complement (as Sweets says to Booth and Bones) each other. It's not about forcing someone to behave well; it's about freeing someone to his or her best behavior.