There's a new movie out called "What's Your Number?" staring Anna Faris that's all about ex-boyfriends and looking them up again to make sure you didn't let the love of your life slip away.

It's great movie material but in real life even when you're dateless and dying for a social life is going back to an old boyfriend or girlfriend ever a good idea?

PIX11's Karen Schaler talks to noted relationship expert Nancy Winston who shares love lessons you'll want to learn before taking the plunge, including how rekindling romances through Facebook. Watch and find out more.