As the saying goes: you can pick your friends, you can pick your nose, but you can’t pick your friend’s nose. Nor can you pick your friend’s ex as your new boyfriend or girlfriend. Sure, no one can officially tell you who to and who not to date. We all try to take the advice from our friends, respect the wishes of our parents, and listen to our instincts, but figuring out who is the right fit for us romantically is a trial-and-error process each time. If you find yourself on the verge of dating the ex of one of your friends, it’s time to think rethink. Maybe the pros and cons of seeing someone your friend used to date can help you decide.