User blog comment:Thailog/Ep. 207 "Depths" discussion/@comment-69.123.242.36-20120609151233/@comment-4454131-20120609175107

When someone says they have history with someone else the way Nightwing said it about Zatanna, it usually means they've at least dated at some point and might still be dating in the present. It's an educated guess and you shouldn't be condecending of other people's opinions.