Every sin, &c.——"Every other sin which a man practises is without the body; its effects fall not so directly upon the body, but often more immediately upon the mind; but he that committeth fornication or any kind of lewdness, sinneth particularlyagainst his own body; not only pollutingand debasing it, by making it one with so infamous a creature, but perhaps infecting and enfeebling, wasting, and consuming it,which these vices, when grown habitual and frequent, have an apparent tendency to effect." It would be unreasonable to insist on the most rigorous interpretation of the words, Every sin that a man doth, &c. but the general sense is plain and true; and probably, on the whole, there is no other sin by which the body receives equal detriment, considering not only its nature, but how much it has prevailed. See Doddridge, Raphelius, and Grotius.
Related Commentaries of 1 Corinthians 6:18
1 Corinthians 6:18
18 Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.