What the Bible says about Oral Sex

Song of Solomon 2:3
As the apple tree among the trees of the wood, so is my beloved among the sons. I sat down under his shadow with great delight, and his fruit was sweet to my taste.
Song of Solomon 4:16
Come ... blow upon my garden, that the spices thereof may flow out. Let my beloved come into his garden, and eat his pleasant fruits.
1 Corinthians 7:3
Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband.