Thanks for the feedback about enterobius vermicularis. I do coach soccer, so maybe I got it from the kids. Wonder who? Yikes.
Cats and dogs never have pinworms (enterobius vermicularis), I have no idea about rabbits but, in order to get pinworms from your pets you're actually eating the eggs, which means you should make you and you family obsessed with washing your hands eery time you touch the rabbits (again, relax with cats and dogs because they can't have them). But if you're not seeing worms or eggs in your rabbits anus then the problem is probably in the humans only.
The most common way of getting pinworms is through little kids because they touch everything and lick their hands all the time, if a friend has pinworms it's most likely for them to get infested too. And remember that the drugs to kill parasites always have to be taken twice with at least 15 days in between! If you don't do that you'll have pinworms again.