They say it grows so cold up here in winter that a man’s laughter freezes in his throat and chokes him to death,” Ned said evenly. “Perhaps that is why the Starks have so little humor.
George R. R. Martin (2012). “George R. R. Martin's A Game of Thrones 5-Book Boxed Set (Song of Ice and Fire Series): A Game of Thrones, A Clash of Kings, A Storm of Swords, A Feast for Crows, and and A Dance with Dragons”, p.53, Bantam