Thread:Essie Essex/@comment-25095321-20131217140906/@comment-25095321-20131217141749

It flows better in the sentence, and just because there aren't two independent clauses doesn't mean that the comma can't be put there. There's no rule saying such a thing, as far as I know. If there are two independent clauses, yeah, a comma is necessary. But if there aren't, then the comma is optional.

It's optional, in this instance, and helps the sentence flow better.