Extreme cold showers are good because:
• You will feel more energetic/alert as opposed to the boiling warmth that would make you drowsy from the sedative effects besides driving you schizo/mad.
• Once you step out of the shower, you won't freeze/shiver/jitter from a sudden temperature change.
• It increases endorphins, improves your metabolism, gives you healthier skin and hair, enhances blood circulation, and may also help preventing common colds.
• You might experience something overwhelmingly more stimulating that's too intense for your nerves to endure one day.
• It wouldn't be as easy to fall asleep in the shower, therefore you would be able to stay awake longer for the rest of the day, and it also causes you to spend less time in the bathroom.
• Hot water requires more energy to heat, resulting in a higher bill at the end of the month.
I also don't wear too much during the winter, the cold feels nice sometimes that it's ok for me to be in my regular clothes despite what people say.