English of Core Text: “And they shall become one flesh” — those who become one flesh; this excludes animals and beasts, which do not become one flesh.
On the daf / in context: The definition of the sexual bond that creates “one flesh” excludes bestiality from the category addressed by this verse’s permissions and prohibitions.
Type of Learning: Custom (exclusion of bestiality from “one flesh”)What Is Learned: The “one flesh” bond applies only to human partners, not to animals.