Concise Bible Dictionary:
Used symbolically for those in separation from evil. Paul had espoused the saints at Corinth to one husband to “present them as a chaste virgin to Christ” (2 Cor. 11:2; compare Rev. 14:4). In their natural application the words apply to both sexes, and in 1 Corinthians 7:36-37 it is perhaps better translated “his virginity.”