Not an entire shower, but I sometimes end with a cooler second rinse.

I go hot for the muscles, pores, and lungs. At the end I wind it down to freezing or as close as I can get, a bit at a time. Typically ends in some kind of barbarian spiritual catharsis involving grunting. Then I picture polar bear club and want to die.

I live in a tropical area, so baths and showers are always in cold water. Hot water is for small children and the sick or elderly.

This is apparently a huge culture shock to people coming from the colder parts of my country.

It has some nice health benefits. Tricks your body into suvival mode.

Everyday on the southern hemisphere, minus in winter.

Only time I intentionally took a cold shower was after a long bike ride, wearing formal clothing, in the middle of summer. It was freeing and very cold.

Cold shower after workout is great for preventing muscle soreness.

Sure, on some Arizona summer days.

The trick is to start at the end of your limbs and move slowly inward until you think you had enough, and definitely not so fast you start to pant: The calmer you are, giving time for the body to switch to the change, the more you'll be able to take, so take it slow. Also don't feel obliged to use only the cold tap, especially in winter that can be rather extreme. Just up to elbows and knees more often than not get you that nice metabolism boost and that's a perfect pre-coffee, OTOH some days are torso days and even others are head days.