My girlfriend was the one interested in the idea of being open; I was duly terrified at the prospect. I asked for a six-month freeze on the non-monogamy plan—which turned out to be exactly what I needed.
Feeling jealous? That's your body being "triggered." Here's how to teach it to chill.
For those of you winding down summer flings this month, beware: it can get messy. Or worse yet, turn into a relationship.