JUST BECAUSE EVERY ROSE HAS A THORN
DOESN'T MEAN ITS NOT BEAUTIFUL
AND IT DOESN'T SMELL GOOD.
THIS IS A METAPHOR.
ITS COMPARING A ROSE TO A WOMEN/GIRL
JUST BECAUSE WERE NOT THE PRETTIEST GIRL IN THE WORLD DOESN'T MEAN THAT WERE NOT NICE AND WERE NOT BEAUTIFUL IN SOME SPECIAL GUYS EYE.