" This smells like shit,” MacRuairi said, smearing the black seal grease over his naked skin. They'd bundled their armor and weapons in a pack to keep them dry when they crossed the river. The seal grease would not only help them blend into the darkness, it protected them from the cold December waters.
“You'll be grateful for in in a few minutes.” MacSorley grinned. “The water will freeze your bollocks off.”
“Which shouldn't be a problem for you anymore,” MacRuairi said dryly.
“Damn, cousin, was that a joke?” MacSorley shook his head. “It does snow in hell.”
MacRuairi muttered something under his breath as he finished applying the grease. "

― Monica McCarty , The Saint (Highland Guard, #5)