Actually grass can make a dog thro up, so dogs will eat it if they don't feel well to make themselves sick

Cats and dogs eat grass for reasons other than to induce vomiting. Nutrition, fiber, irritants stuck in the throat/stomach, throat/stomach inflammation, obstructed bowels due to hair balls or other such blockages, acid reflux (or the animal equivalent, anyway) or constipation. If your companion animal is frequently vomiting or eating grass, it should probably be brought to your veterinarian's attention to see if there is a more severen underlying problem, since many of them can cause serious damage long term.

No, i used toilet paper to grab and pull out the poop.

I don't see how it's that much worse than cleaning the litter box. Or does your boyfriend have to do that too? The problem is only when i don't catch it happening, and she dislodges it herself by violently running and jumping around (including on my bed). Then i either find a present in a special location, or i wonder where the smell is coming from...

One of my dogs has done the exact same thing and I had to pull grass from her butt. My other dog ate tassels off of a pillow when he was a puppy and, you guessed it, I had to pull that out of his butt too.