Matthew Poole and continuators on 1 Corinthians 7:34

34 There is a difference also between a wife and a virgin : The unmarried woman careth for the things of the Lord, that she may be holy both in body and in spirit: but she that is married, careth for the things of the world, how she may please her husband .

There is the same difference betwixt a married woman and a single woman, as there is betwixt a married man and a single man.

If a woman be unmarried, and be piously disposed, she hath leisure and opportunity enough to mind the things of God; but if she be married, she will then be obliged to attend secular affairs, to take care for her family, and to please her husband. It is the same thing that was before said of the man. The sense is, That a conjugal relation draws along with it many diversions, from which a single life is free.