Fantasies play a valuable role in our sex-lives. First off, they fuel arousal: "Thoughts can create real physical changes in your body, and you can use this to your advantage," writes sex educator Emily Nagoski in the Good in Bed Guide to Female Orgasms. "This is why people fantasize even while they're having sex - the added juice of the fantasy heightens arousal when the physical sensations Top 5 Female Sex Fantasies And What They Mean | HuffPost Please note: You are currently browsing img little sister anallittle nudist family that is 1280x720px in size. This image is listed in sister anal sex category. Top 5 Female Sex Fantasies And What They Mean HuffPost, 1280x720 in 130.10 KB.