That's a way to increase the realism to the reader, if you want to get technical - you leave it [character] vague and you let the reader fill in the blanks with their imagination.
Nicholas SparksSummer romances end for all kinds of reasons. But when all is said and done, they have one thing in common: They are shooting stars-a spectacular moment of light in the heavens, a fleeting glimpse of eternity. And in a flash, they're gone.
Nicholas Sparks