Yes you can just make sure the string of the tampon is up front of the vagina if it at the bottom of the vagina and poop gets on it you can get a yeast infection.
Can U Poop With A Tampon In?
Even if you were retarded enough to put a tampon up your ass, your bowel movement would push it out. Duh!!
Can you throw up with cotton in your mouth? Honestly, I sure hope this was a serious question...I only answered in case it was. But, you sound like a 4 year old. Call ask-a-nurse or your mom next time.