Ah, gluttony. "Let's not talk about that."
Sex was God’s idea and He created man the way He did with that purpose in mind.
For PLEASURE and reproduction.
Man did not come equipped the way he did for the purpose of being able to relive himself standing up.
... not to mention the nerve endings, strategically located on both man and woman.... including Mary and Joseph.
Them dang Jews had the Song of Solomon in THEIR scriptures; so Rome HAD to include it as well.