Heart break is the seed that pollinates from chest to chest. So it should not come as a surprise when a crimson rose blossoms behind the sternum with a wealth of thorns surrounding it. Evolution has dictated that If anyone comes too close, they will get pricked in the process. A subtle form of protection, but also a warning. A "Come no further than this." ---
The thing about roses is that they are capable of self pollinating. Sometimes we just do this to ourselves. We get off to our own misery, and as crude as that sounds, for a lot of us, that has been the truth.
A broken heart can only protect itself the best way it knows how, but when did protection become repression? It is too easy for the same thorns that defend the rose to become its own enemy, choking the flower out of the nutrients it needs.
We can justify all we want that if somebody truly wanted to pick us first to put us first, then they should be able to withstand a little pain to reach us... And some do, but should that be the standard, to hurt someone and see if they stay?
That is how cross pollination occurs. We **** around and hurt people by refusing vulnerability that is owed to them. And after all the *******, the other person can heal and grow stronger from the experience, or the rose they have wilts and a new one blooms in its place, one that contains undesirable characteristics that would not have existed if we had just loved openly in the first place.