The most obvious function of toilet paper or bath tissue is for hygienic purposes.
Bath tissue vs toilet paper.
Also since toilet paper is made to dissolve when exposed to moisture it will tear or be blown through when used to blow your nose.
When using toilet paper to wipe or blow your nose it will not have the same soft feel as facial tissue and may further irritate an already sore nose.
Intuitively toilet paper is used the same way by all countries who use it.
If you want to use facial tissue instead of toilet paper for wiping after using the bathroom you risk damaging or clogging your plumbing and septic system since it does not dissolve the way that toilet paper does.
A tissue in a box preferably not in the bathroom might be a safer bet in this case unless someone is reaching into the box with a germ ridden hand in which case all bets are off.
So to answer the age old question of.
These worlds collided when i learned about peach a startup hawking luxury bath tissue aka toilet paper.
Companies promise to disrupt many parts of our everyday lives from sleep brooklinen casper to eating hellofresh blue apron to using the toilet for the better.
I was very surprised to find that the three ply kleenex anti viral tissue was more than 90 extra a year over the toilet paper.
As you can see the toilet paper came in the cheapest.
If you re reaching for some toilet paper to blow your nose consider whether that roll of toilet paper is shielded from the germs that can aerosolize with each flush.
In addition there are many other uses that are non traditional and vary by household.
Most modern sewage systems can accept bathroom tissue as it is designed for such use.