Within the context of penitential literature (concerned with the identification and classification of sins), the strict position is that there is no conceptual position for the sexually active singlewoman who was not a prostitute (with a slight allowance for the concubine--sexually active with, but not married to, a specific man--as contrasted with the prostitute who was "common to all"). But detailed treatises such as the early 15th century Jacob’s Well reveal more differentiation.