How come these verses exist in the Bible?

Why are these in God's Holy Book?

"She lusted after her lovers, whose genitals were like the genitals of donkeys and whose ejaculation was like the ejaculation of horses."
"And she was mad with lust after lying with them whose flesh is as the flesh of asses: and whose issue as the issue of horses."
"My beloved put his hand by the hole of the door, and my bowels were moved for him."

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And just to make things clearer than is, the site suggested the question to be posted in Sexuality. For God's spoken words. Thanks for moving it Mods.
How come these verses exist in the Bible?
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