The besetting sin of all times and countries, the one great proof of the inherent corruption of man's nature. Pleasures are attractive because they are forbidden (compare Romans 7:7).

Stolen waters are sweet - I suppose this to be a proverbial mode of expression, importing that illicit pleasures are sweeter than those which are legal The meaning is easy to be discerned; and the conduct of multitudes shows that they are ruled by this adage. On it are built all the adulterous intercourses in the land.

Stolen waters are sweet,.... Wells and fountains of waters in those hot countries were very valuable, and were the property of particular persons; about which there were sometimes great strife and contention; and they were sometimes sealed and kept from the use of others; see Genesis 26:18; now waters got by stealth from such wells and fountains were sweeter than their own, or what might be had in common and without difficulty, to which the proverb alludes. By which in general is meant, that all prohibited unlawful lusts and pleasures are desirable to men, and sweet in the enjoyment of them; and the pleasure promised by them is what makes them so desirable, and the more so because forbidden: and particularly as adultery, which is a sort of theft (r), and a drinking water out of another's cistern, Proverbs 5:15; being forbidden and unlawful, and secretly committed, is sweeter to an unclean person than a lawful enjoyment of his own wife; so false worship, superstition, and idolatry, the inventions of men, and obedience to their commands, which are no other than spiritual adultery, are more grateful and pleasing to a corrupt mind than the true and pure worship of God;
and bread eaten in secret is pleasant; or, "bread of secret places" (s); hidden bread, as the Targum, Vulgate Latin, and Syriac versions; that which is stolen and is another's (t), and is taken and hid in secret places, fetched out from thence, or eaten there: the sweet morsel of sin, rolled in the mouth, and kept under the tongue; secret lusts, private sins, particularly idolatry, to which men are secretly enticed, and which they privately commit, Deuteronomy 13:6; the same thing is designed by this clause as the forager.
(r) "Furtiva Verus", Ovid de Arte Amandi, l. 1. "Furta Jovis, furtiva munuscula", Catullus ad Mantium, Ep. 66. v. 140, 145. So Propertius, l. 2. eleg. 30. v. 28. Pindar; for which he was indebted to Solomon, according to Clemens of Alexandria, Paedagog. l. 3. p. 252. (s) "latebraram", Junius & Tremellius, Piscator, Michaelis. (t) "Quas habeat veneres aliens pecunia nescis", Juvenal. Satyr. 13.

The language of a proverb, meaning that forbidden delights are sweet and pleasant, as fruits of risk and danger.

Sweet - From the difficulty of obtaining them; and because the very prohibition renders them more grateful to corrupt nature.