Straw wrapper

So, I was at Red Robin on Saturday night after the football game against UCLA (We beat them 59 to 0. Go Cougs!) eating with some friends. While we were waiting for our food to arrive, we were playing with our straw wrappers and Lewis tied one in a knot and gave it to Jessica to pull apart. When she appeared confused, he proceeded to explain the tradition involved with it. He said that you tie it in a knot and then pull on both ends until it rips. If it still has a knot in it after you tear it apart, it means someone loves you. If not, you're out of luck.
While I (from UT), Lewis (from CA), and Jonny (from TX) all knew the tradition, Jess and her sister (from ID) had never heard of it.
I searched online and I found a few variations of this tradition. One of them was that you think of someone and if the knot stays in (or comes undone--another variation) then that person is thinking of you. I also found one that was for two people. You tie the knot, both make a wish, and both pull on one end. The person who gets the knot on their end has their wish come true.
Fun little tradition.