Call it perfume-ative hygiene.

Experts say the daily shower has no proven health benefit, dismissing the dousing as a socially accepted practice geared toward staving off accusations of funkiness — as A-listers like Jake Gyllenhaal and Mila Kunis admit they’ve been saying no to the nozzle.

“Why are we washing? Mostly because we’re afraid somebody else will tell us that we’re smelling,” environmentalist Donnachadh McCarthy told the BBC.