Thank you for your answer.
I'm no biologist or bonafide physician but I definitely know that bacteria and virus do not react well with the exposed environment i.e., wherever you are: indoors, outdoors, your place, public place, etc. In fact, in a few minutes, they often die out since there is no life being available to them. A napkin is just a graveyard for bacteria to linger on for a while until it dies off. However, it is likely impossible for someone to contract a std from a napkin containing vaginal fluids or residue. Even if the urethra of the penis is exposed to the fluids, it would have to take a large quantity of it to be risk for you.
Thanks, I posted it there as well. But can you also answer the question here since you saw it?
Sorry, it's my first time, how do i do that?
Please post in the HIV forum.