A safe way to poop and wipe will keep your tampon firmly in place and stop any bacteria from passing from your rectum to your vagina. The string on a tampon can become soiled with urine and poop, which means it needs to be tucked up before you go. You can do this by bundling up the string and tucking it into your labia. Once your string is out of the way, you can poop and wipe from front to back without contamination. Some women remove their tampons before pooping, but this can be painful if your tampon is still dry.