I disagree! Those fantasies usually result from men and women not receiving fulfillment from their partner. Lovemaking is a two way street both partners need to work hard to focus each others attention on them. Good communications during sex is the key. Avoid getting into a routine, and I'm talking about both partners! Plan new adventures together (we get horny doing this), agree on details, then execute with critique afterwards. Keep what works for both of you a toss the rest. Failing to plan is planning to fail! If both of you aren't excited expecting some new experience then the mind generates ones. The goal of perfect sex is never achieved but always pursued and trying to get there is the spice of life.