A number of times upon entering the shower I feel I would like to take that fresh, healthy two-minute shower that lets you exit crisp and clear like a sparkly-water commercial.
However, I lack the willpower, and usually end up staying for at least 20 minutes, with the water as hot as I can stand it. When I get out, the feeling is similar to that of having been in a sauna.
It's not commercial-fresh, but I like it nonetheless. I like the heat of the shower, and getting out a little woozy, feeling your pores opened as though you've soaked it up good.

Showering, like sleeping, lets me get in touch with myself physically, without clothes in the way. Lets me connect to myself.
Sometimes I heighten this sensation through showering with only a candle or two as lightsources, or with all lights off. It reminds me of lukewarm swimmingpools at night with no one watching, and it makes me feel good, and inspired. But you have to be careful here. As with most ways of heightening a sensation, do it too often, and it won't be the same.

So there are a number of things I really like about showering. In spite of this, though, I don't take one every day, or even every other day. Perhaps every third, on average.
Really, I don't think I need showers more often than that. After all, I don't really get dirty too often - I don't regularly partake in any sports-related activities, and physical exhaustion of my body is more of an exception than a rule.

So as it is, when I do take a shower, I've found that it's usually a decision based on wanting the comfort and relaxation of the hot water and the process itself, rather than a desire to clean myself up.
Over here we live in a world almost free of bodily scents already. When you smell someone, rather than the actual smell of that person, you smell deodorant, shampoo, soap and a variety of perfumes. Compared to 100 years ago, this is clearly an improvement, but today it can easily get to be too much of a good thing.
Me, I like to be able to smell myself, and others who are important to me. Smells are individual, and give a sense of comfort, familiarity, and - in some cases - excitement. So I tend to want a few days to pass between my showers. Enough time for my smells to return, and for my hair to lose the glint of shampoo and get comfortably tangled up.

Of course, abundant access to clean water like this is, in essence, a luxury. In Tanzania we showered in rain water, collected in huge cisterns during the monsoon rains, and then gathered up in buckets and boiled. You would mix it with cold water to get a suitable temperature, pour a can or two to wet yourself, soap up, and then two more cans to rinse it off.
It got you clean, and that was it. Of course, to me, it was very exciting, and not for a second did l miss my regular way of taking showers.
Against this background, it could be argued that excessive showering is a waste of water, but I'd think it's still one of the better ways in which we use it. And as such, it doesn't spoil the water in any way that it cannot be recycled.