The main concern is that what you are wearing doesn't adequately separate you from the surface you are sitting on and what is on it as many short skirts are going to ride up leaving you sitting directly on the seat and whatever has been deposited before you got there as well as you leaving yours for the next person.
Besides that, ever notice how most busboys (or table buspersons for the PC) use the same wash cloths to wipe down the tables and the seats between patrons at restaurants? Mmmm! Yummy!
NOT!
Ok, ok, ok.... That great but let think about you or all of us! Every day we go in public place, bus, tram, train, office, parc,... And sit on a chair, and generaly nobody look if it's clean, really clean!
If there are something we generally push it with hand then sit. So what ever your wearing pant short dress skirt long or mini, the same happend! You take all bactery that are on that sit and take it to your home. Once at home, you sit on your sofa, bed or chair in your home then transfert that bactery...
In the morning when wake up you sit on that chair or sofa or bed wearing just a string or nothing then transfert that bactery on you, your pussy, your ass, your dick....
For you guy, let talk about other thing!!! Every day you go to toilet to piss, how many of you watch your hand before touch your cock to piss? Nobody? Why? Just to let you know, male toilet door have more bactery, virus... Than the toilet!!! Why? Nodoby clean the fist door! So when you go to toilet yoz open the door generaly with your hand then take your dick with the same hand.... So i let you imagine what happpend with all microbe on the fist door and where there are now!!!!
Could be the same for ladies...
So stop, stop stop thinking that wearing panties is more safe than do not! You take microbe of public chair public place everyday to your home then transfert them on your genital part by transfert!!!!
Do ladies that don't want to wear panties, this is your choice and only your!!! Just take care of you!!!!