Oh, its not that folks didn;' bathe then, Arthur - they did. It just wasn't a daily thing. Actually, one of the semi-official "Persons in waiting" for higher nobility was the Master or Mistress of The Bath. And there's no denyin'the antiquity of the sayin' "Don't throw the baby out with the bathwater"; bathin' was a big deal, and bath day was a family affair; Dad got his first, then mom, then the kids, so, by the time the baby was done,the bathwater was pretty murky. Daily bathing didn't really become a fixture untill the urbanization of the latter part of the indudtrial revolution ... and even then, the practice took a while to trickle down the socio-economic ladder.
And it was indeed linen-based rag paper that became cheap. In the 8th Century, the Chinese method of papermakin' was brought by the Arabs into Spain, and the French soon grabbed the idea. Still, paper suitabl for writin' - or printin' - on required a costly, slow labor-intensive process. The fine papers of the French and Spanish mills were costly luxuries. The 14th Century printin' press drove the demand for paper, with supply-and-demand havin' the natural effect; the price went up and folks looked for cheaper ways to produce it. by the 15th century, the availability of vast quantities of linen rag material, and the mechanical advances of emergin' technologies camr together to bring about good, cheap paper - and books - for the common man.
The mass-production loom, the printin' press, and the paper mill all are bound up in that inextricably, each dependin' on the other, and together chief foundation of what became the industrial revolution. Which brought abpout daily bathin', so its all Gutenberg's doin' that we're more hygienic than were our forebears