Daily. I'd do it twice a day if I weren't so slow, and if showering weren't so tiring. It's not too bad. For some reason, whilst being naked, period, makes me feel awful, being naked in the shower, ever since erections have ceased to exist, doesn't really bother me.
Besides, ew, showering once a week, I wouldn't survive it. Because of the midterm school work rush, I skipped my shower this morning, and at 36 hours since my last shower, I already smell (mostly because tucking makes a warm area pretty close, and perspiration and such make bacteria develop), and my face is already showing signs of "wash me ASAP, or ingrowns and pimples are coming your way!"
Yeah, no. If you manage to put your mind on something else whilst showering, it should be okay. I'm a huge daze, so it's easy for me, but you could try things to keep your mind off your body. Bringing music and singing a lot, for example. Or always showering in the morning, when you're in a huge hurry. That's what I do, except that for me, the goal is to speed things up. (25 minutes instead of 40, whoo, ALMOST normal!)
I know I should take baths, but I can't. I'm just unable to clean myself if I'm soaked in water. All the cleaner just goes away, and I have to stand up to wash myself anyway. Not to mention all the disgusting stuff I may have on me (little black pieces from my socks for example) is just floating around; really disgusting. And finally, I need to empty the bath and use the shower to rinse anyway, because the water is soapy.
Oh yeah, and you always have two choices: nearly boil in the beginning, or freeze in the end, because it cools down so fast. I hate baths. Can't relax because you float or slip away, and have nowhere to put your head (or the air pillow just doesn't hold in place), can't wash yourself properly, can't sit properly, can't lie properly, and can't swim. Rwar.