Thank goodness that the issues of bio-hazards, exposures to bodily fluids, cross-contamination, and other significant concerns, were not so prevelant or dangerous back in the 50's and 60's. Even in the 70's, such things as HIV/Aids were not very common. While yeast infections, STD's, and other bacterial infections likely caused some grief for people, I don't believe they resulted in nearly as many deaths.
That being said, there never seemed to be any/much concern about family members sharing enema and douche equipment. I know my mom lent our enema bag to other extended family members to prep for various exams, tests, and hospital stays. I admit that I found my mom's stash of nozzles, vaginal contraceptive applicators, and diaphragms. My sister and I played doctor and nurse or house, and often incorporated these items into our "exams". After all, enemas seemed to always be given as a result of a housecall by our pediatrician.
I don't ever recall my mom becoming ill, or suffering ill effects, after using the same items that found their way into our rear ends. We were pretty good about washing them if telltale signs were obvious.
It wasn't until I was into my early 20's that related literature advised against sharing such things. The "family" enema/douche bag and bulb syringes were just that. So far, we've survived, save for old age and other unrelated morbidities.