The wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his body, but the wife does (1 Corinthians 7:4).
To “have authority” refers to the right of control. The wife, Paul asserts, does not have the right to withhold herself from her husband; instead, the husband has the right of control over her body. In the same way, using nearly identical language, Paul asserts that the husband does not have the right of control over his own body, but the wife does. The concept is illustrated here by a bust of Claudius, crowned with an oak-leaf diadem as a symbol of his authority.