Expect I used to share a flat with a woman I worked with. She showered morning and evening but by lunchtime you could smell her armpits halfway down the office. It very much depends on the person, how much they sweat etc.
www.irishexaminer.com/lifestyle/fashionandbeauty/beautywatch/why-not-avoid-the-showers-and-have-a-dry-day-235952.html
"There are other concerns about daily showering, which might encourage us to do it less. Dermatologists fear that regular washing is stripping the skin of essential oils that keep it supple and moisturised. Every time you take a shower, you’re sloughing away at your skin’s structure. Soap and hot water dissolve the lipids in the skin, and scrubbing with a flannel or loofah only hastens the process. The more showers you take, the more frequent this damage and the less time your skin has to repair itself through natural-oil reproduction.
Dermatologists say that daily dousing with hot water, combined with harsh soaps, can strip the skin of its oils, resulting in dryness, cracking and even infection.
The same is true of hair, which becomes dry, brittle and lank when repeatedly washed. Too much soap strips hair of sebum, the oily substance secreted by our scalps to ward off bacteria. As a consequence, we produce more sebum, resulting in a lank and greasy look. We shampoo and condition again to rectify it, unwittingly compounding the problem.
There is also evidence that over-diligent personal hygiene destroys beneficial bacteria on the skin that help the body to ward off infection. Studies at the University of California have shown that, like the gut, our skin harbours ‘good’ bacteria that help skin cells to produce their own antibiotics. By repeatedly washing and scrubbing ourselves, we are flushing these down the plughole.
“A vigorous, daily shower would definitely disturb the natural bug flora of the skin, as well as skin oils,” says John Oxford, professor of virology at Queen Mary’s school of medicine and dentistry, in London.
While Professor Oxford recommends frequent hand-washing to minimise the spread of harmful bacteria, he is more lenient about showering.
“As long as people wash their hands often enough and pay attention to the area of the body below the belt, I do feel showering or bathing every other day would do no harm,” Professor Oxford says."
Dem stinky Scientists eh ...