Read 1 Corinthians 7:4 Using Other Translations
The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.
For the wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his own body, but the wife does.
The wife gives authority over her body to her husband, and the husband gives authority over his body to his wife.