I've become aware that some fantasies translate better into "real world" sex play than others. Also there are also some fantasies that should stay private and not be shared with one's partner. my gf has the gift of knowing which of her fantasies should be kept to herself, which are likely to be successful and which should just remain fantasies. I'm new to the concept of sharing what's going on in my head that way so I dont always get it right. as a matter of fact the first time i tried to bring a fantasy i'd had into our sex life it was a disaster. my question is, how do you determine if a fantasy is likely to translate well into erotic role play or if it should just stay as fantasy. also how do people decide if something is appropriate to share with their partners or if they should keep it private?