One day soon, you’re going to leave the office at 6 p.m. and it’s going to be dark outside. Not dusky, but pitch-black — and cold. Instead of heading out on whatever adventurous plans you made, you might feel more inclined to just go home and have a couch night with some takeout. We won't blame you: The onset of winter weather often makes the comfort of the familiar more alluring. Relationship-wise, this can be an especially tempting time to revisit past loves instead of seeking out new ones.
The standard dating guidebook has “sex with your ex” in the “never do it” category — you know, alongside "letting the mystery die" and "burping." But, no rule is absolute; there are plenty of times when it can be fun — even healthy — to revisit the flings of the past. Here’s a guide to when and where it’s okay to reopen the ex-file.