Fellatio in Halacha
Within the guidelines of halacha, as presented by chazal and early rabbinic authorities, fellatio is classified as ביאה דרך איברים (penetration by way of the limbs) or מעשה חידודים בעלמא (general acts of sharpening). Peripheral halachic discussion of the topic revolves upon whether a husband may engage in varying sexually-gratifying acts with his wife – including fellatio – performed up to ejaculation.