[brigandish]

That’s known as the Scottish Shower, perhaps because Scotland is all too often wet and cold, or perhaps as a reminder not to relax in indulgent things as there’ll soon be something along to spoil the fun!

On a more serious note, I take cold or Scottish showers all year except for the coldest part (because Japanese houses have the worst insulation you’ll come across so you’ll go from cold to cold) and it does make me feel better. Even just enduring the pain of the cold seems to bring benefits.