Fantasies come in many different intensities. Some are so compelling that you just have to act on them. But other fantasies fall under another category: Ones that pique your curiosity, but also make you a bit nervous. Maybe it's a fantasy that's lingered in the back of your mind, and you're not sure you want to bring it to fruition. Or maybe a partner suggested something that you hadn't thought of before. When your feelings aren't very strong one way or another, it can hard to know whether you should actually give it a shot.