With all my due respect for the Japanese customers, it should actually work the other way around
Most of us (at least people from the western world) grew up with some sorts of basic 1-0-1 sexual education provided, somehow, someway, at least at school.
Most of us later on learned our lessons the hard way in our young years, helped by a bit of Doxycycline here and Azithromicine there
Most us went to some sorts of anonymous (or not) free HIV/STDs clinics where we got to talk to a doctor without any taboos about this and that.
What we did with all we learned is another thing and we might or might not always wear condoms and so on. But at least, we know more or less the risks we might take and what we might have been exposed to.
Some people here simply don't. It's a different culture, with lots of taboos, especially amongst the older generations. When I see things like that, I usually laugh a bit.