Possible Clues:

• Not showing strong feelings
• “Musicians are seldom ____; a woman who could sing like that must know how to love indeed” (Honoré de Balzac)
• Cold man, i.e. no lout becoming excited
• Choice of dishes turned one on — a lot re-served cold
• Calm, cool
• Reserved male union to merge
• Stoic
• Volume turned up during meeting that's almost fully reserved
• Without personal feelings
• Cold