Eg daily grooming, trimming, bathing and deodorizing. If I went a week in the Western world today without bathing, friends and family would criticize, and strangers wouldn't be too friendly either. When did these things, like daily or every-other-day showers, become a trend and why?
hi! while you may get some answers here, this question might be a better fit for /r/AskAnthropology. Meanwhile, there's a large section in our FAQ (link on sidebar) stuffed with previous discussions on various related topics:
Health, Hygiene, & Personal Grooming
Also, a note for future questions: it would greatly help the historians to answer if you specified the culture/region/country you're interested in, since culture differs greatly across the globe.