The Song of Solomon mentions the name "Solomon" several times. Is it plausible to understand Solomon to have become a symbol of masculinity (a wise, mighty, powerful womanizer), and read references to Solomon as comparisons of the bridegroom to the symbol of masculinity (much like one would understand a man being called "Casanova")?
I am sure there are many ways to read these references, if this is what you wish to do. Apparently this was originally an operetta (John Romer, Testament: the Bible and History). Although this poem is attributed to Solomon, the language and style indicate that it was actually written after the end of the Babylonian Exile.
The Song of Solomon tells the sexual experiences and thoughts of a dark-skinned woman, but seems to have no real historical or religious significance. The singer is portrayed as a farm girl whose skin is darkened from her time in the sun, and her lover as a shepherd:
The two make love in the fields, and she calls him her king, pretending that the trees are a palace – “the beams of our house are cedars, our rafters, cypresses.”
The song ends with the girl wishing that he were her brother, so that she could kiss him in public without being teased, and they would be together in the home of her mother, after which she speaks of her innocent young sister:
Some find in it a portrayal and praise of the mutual love of God and his people, or an inspired portrayal of ideal human love. Perhaps it can also be seen as comparing the bridegroom to the “masculine ideal,” but only if we read into the song actual references to King Solomon.
As I understand your question you are exploring the possibility that rather than being intended as historical or some kind of mystical religious text it is actually a fictional secular depiction of Solomon as an idealized lover, yes? If so you are spot on. This rascal of a scroll is indeed a paean to the mythical sexual prowess of Solomon from the point of view of an Ethiopian slave girl who becomes his one true love.
I'll do some exposition on the first chapter (JPS) to see if this is not so:
The title says this is a song, the greatest song and for Solomon:
Immediately the protagonist is longing for his kisses. Not "soul kisses" but the ones from his mouth, which she says are more intoxicating than wine:
She says he smells so good in his body oils it's like he's a fountain pouring oil on the ground. "Obsession" I think or "Forbidden Night". She says it is no wonder that the teen girls flock to his bed:
The teen girls flock to his bed and they are intoxicated with his smells during love making:
She laments that she is a lowly slave, unworthy to look upon:
She decides she needs to ditch her veil and self-loathing and finds the courage to arrange a "chance" meeting when he's out with his goats:
She compares him to an Egyptian stallion:
She oozes as she ponders holding him between her breasts in her imagination:
Apparently she has a thing for nice woodwork, reminding us how strange is the heart:
And on and on it goes.
For fun, let's contrast that to the beginning of "The Wisdom of Solomon":
Rather than declaring his promiscuity to be offensive and abhorrently sinful he is admired and celebrated and wins the heart of the protagonist. Their bodies, genitals and intimate sexual relations are described in thinly veiled figures. He delights in her garden, she in his apple tree. There is a chorus of Jewish women. And in time they are married with pomp and circumstance. It is quite the bold story for the times and its presence in the middle of the scriptures shocks like two unmarried tattooed teens fornicating in the back row of a Church on a Sunday morning while the preacher is preaching!