My friend told me this and i have no clue what it really means but i thought it was Funny.

Stranger stabs you in the back, not knowing they are seguro and they can be dangerous and annoying. amor stabs you in the heart, well, I think you can understand that.
friends stabs you in the front, because maybe you see it coming.
Best friends poke you with straws because they would try their best to never intentionally hurt you. BFF.

This is just my theory ok? So I'm not sure if they are correct or not. But this is the best thing I could do. Hope this helps. ^_^