Mishneh Torah, Forbidden Intercourse 21-22

Sugya Map

• Issue: The scope of lo tikrevu (Lev. 18:6)—does it establish a Scriptural prohibition for non-genital physical intimacy (derech eivarim)?
• Nafka Mina: Whether physical closeness with arayot warrants malkot (lashes) or is merely a Rabbinic safeguard (gezeirah).
• Primary Sources: Mishneh Torah (Forbidden Intercourse 21:1), Sifra (Kedoshim), Sanhedrin 74a, Shabbat 13a.

Text Snapshot

• Text: "Whoever shares physical intimacy with one of the ariyot without actually becoming involved in sexual relations... and derives pleasure from the physical contact should be lashed according to Scriptural Law." (MT 21:1).
• Nuance: The Rambam emphasizes derech ta'avah (out of desire). Note the dikduk: the text shifts from the general lo tikrevu to a specific, punitive framework.

Readings

• Rambam: Asserts malkot for non-genital intimacy with arayot based on the exegetical link between lo tikrevu and the prohibition of "abominable practices." His chiddush: the "fence" is not merely preventative; it is a Scriptural prohibition against the initiation of desire.
• Ramban (Hasagot to Sefer HaMitzvot, Mitzvah 353): Argues that such acts are strictly Rabbinic. He challenges the Rambam using Shabbat 13a, suggesting that if these acts were Scriptural, the Gemara would have utilized the Sifra as a source to contradict the leniencies in Shabbat.

Friction

• Kushya: If the prohibition is Scriptural, why does the Rambam maintain elsewhere (MT Hilchot Ishut 1:5) that the definition of bi’ah (sexual relations) is strictly limited to vaginal/anal entry? If derech eivarim carries the same malkot, the functional distinction between "closeness" and "relations" dissolves.
• Terutz: Yitzchak Yeranen distinguishes between the act of bi’ah (which defines the marital/procreative relationship) and the act of kerivah (closeness), which Rambam treats as an independent prohibition against "abominable conduct" (to’evah). The punishment is for the defilement of the intimacy, not for the invalidation of the act of bi’ah.

Psak/Practice

The Rambam’s ruling serves as a meta-halachic heuristic: the "Fence" (seyag) is not a suggestion; it is the boundary of the forbidden act itself. In modern practice, this necessitates yichud (privacy) laws as a binary switch—not just a recommendation for the pious, but a structural requirement to prevent the "abomination" of proximity.

Takeaway

Proximity to the forbidden is not merely a risk; it is a violation of the sanctity of boundaries. The law treats the desire for the prohibited as an objective breach of the mitzvah.