The comparison of your relationship with your boyfriend/girlfriend to the song Grenade by Bruno Mars. Using his lyrics as guidelines, the seriousness of your relationship can be easily determined.
Jen: Do you think Joe is serious about our relationship?
Julia: I don't know- You should try using the Grenade Comparison.
Jen: Good idea! Do you think he would he jump in front of a train for me?
Julia: I don't think so. You guys have just been hooking up. I wonder if Kyle would catch a grenade for me- we have been together for two years.