The "other woman" in a case of adultery is sometimes call the "mistress". The corresponding term for a male who becomes involved with a married woman was historically co-respondent, used in...
It was called no mans land because no man lived their and the land was deserted. Sometimes the land was forests all shot down during the war
they wear parkas
exactly that or. . . Man vs Himself
The shape is similar to the military sailing ship known as a man-o-war.