John Chrysostom
What does "due goodwill" mean? The wife does not have authority over her own body, but is both servant and mistress of her husband.
If you withdraw from the service owed, you offend God. If you wish to withdraw, do so only with your husband's permission, even if only for a short time.
Therefore he calls this matter a debt, to show that neither spouse has authority over himself, but that they are servants of one another.
Thus, when you see that a prostitute tempts you, say: my body does not belong to me, but to my wife. Let the wife say the same to those attempting to violate her chastity: my body does not belong to me, but to my husband.
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If neither husband nor wife has authority over the body, much less do they have authority over possessions. Listen, you who have husbands and wives: if you should not regard your bodies as your own, then much less your possessions.
It is true that in some places of the Old and New Testaments great precedence is given to the husband. Thus it is said: "Your desire shall be for your husband, and he shall rule over you" (Gen 3:16).
And Paul in one epistle makes such a distinction between spouses: "Husbands, love your wives," and, "let the wife fear her husband" (Eph 5:25, 33).
But here equal authority is assigned to both, no more and no less. Why? Because he is speaking about chastity. In other respects, he says, let the husband have precedence. But in chastity, no.
Neither "the husband has authority over his own body," nor does the wife (1 Cor 7:4). There is great equality of honor, and no precedence.