First off, while far from pleasant they're not intolerable.
Having a heater in the bathroom helps. I installed that thing to make winter mornings more bearable but it has also come in handy lately. Nothing like hot air to make cold water just a bit more tolerable.
A glass of bourbon makes the experience a little easier to deal with. Being a little tossed makes just not give a damn and since alcohol tends to make you feel hot anyway the cold is easier to ignore.
24 minutes ago