While this verse is about sexuality, it is also much more powerfully about the idea of the equality of the sexes. This seems somewhat surprising to us in modern times. In this verse, Paul is very clearly telling us that, in some ways at least, a marriage is a union of equal partners. Here, he is not telling wives to submit to their husbands. Here, he is saying that men do not have any more authority over their bodies than their wives do over theirs. Each partner in the marriage has equal control over the body of the other. So, while this verse is about the idea that sex within marriage is good, it is also about the idea that both husband and wife have equal duties toward the other and that neither spouse is superior to the other.