1 Corinthians 7:3

Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband (KJV)

Then: Paul alternates his advice mutually addressing both husband and wife. Fee (p. 270) thus infers that some of the problem concerning marriage was theological. Since women were given the Holy Spirit, accepted into the kingdom, an end-days or eschatological belief could mean there was no reason to continue sexual relations. Paul does agree that women should be included in worship services and he later states that singleness is preferable, but his direction is to continue "benevolence" within the marriage bonds.

Now: We wonder why the Lord has tarried so long in returning to take us with him. We know the answer, "not wishing that any should perish, but that all should come to repentance" (II Peter 3:9), and we know that Jesus told the disciples only the Father knew the time of the end. Paul's advice is practical for the Corinthians, for us, and for those who follow us. Yet we do wish the Lord would come soon.

Extra source: The First Epistle to the Corinthians by Gordon D. Fee (Eerdman's 1987) online at http://books.google.com/books?id=XlBp10nUTXAC&dq=Gordon+Fee+Bible+commentator&printsec=frontcover&source=in&hl=en&ei=SwLNSu3nA4v6Mf2XlDo&sa=X&oi=book_result&ct=result&resnum=12#v=onepage&q=&f=false