That's a little hard if you're plain looking at it (and you're comparing it with all other people in the world), but if you are a woman, comparing with a man, and it looks pretty darn...bloody (menstruation), then you know it's YOURS and not his. On the other hand, menstruation and what comes out is not really urine, but if you just mean waste of any kind coming out from your body, then that applies.
only if the urine is someone elses
What!?!?!?!?
Hopefully its not an important urine test, it IS going to show up and there isn't much you can do about it other than steal someone elses urine.
Some people say that you can use soap or bleach. Others say to use someone elses urine.
IF ANYONE ACCIDENTLY swallows human urine, they will not be "poisoned". When a healthy person urinates, it actually come out sterile. But seeing how urine is the "waste water" of the human body, I would not recommend that people drink urine, whether it is their own or someone elses.
Walking a mile in someone elses shoes.
I want to report immigrants using someone elses documents.
No,it is rude and illegal to rip someone elses' campaign poster.
take someone elses ;)
Goldilocks
yes
no its is most likely impossible because the THC stays in your system for about 90 days. an allternitave is to get someone elses urine