Modifiers matching intercourse:

• sexual,
• unlawful,
• extramarital,

Simple categories matching unlawful:

• act,
• activity,
• action,
• use,
• discrimination,
• homicide,
• vice,
• behavior,
• user,
• enterprise,
• play,
• conduct,
• motivation,
• interference,
• deeds,
• practice,
• purpose,
• infraction,
• diversion,
• material,
• intercourse,
• harassment,
• measure,
• behaviour,