But according to research published in the journal Personality and Social Psychology Bulletin, it might be “distinct” from other sexual fantasies, like submissive acts or group sex. Instead, the authors found that the habit might say something about your attachment style and relationship satisfaction. The fantasies were grouped into four sections: submissive sexual acts, group and/or anonymous sex, romantic sexual encounters, and sexual nostalgia. These factors seemed a lot less likely to influence whether someone with an avoidant attachment style experienced sexual nostalgia, however. Additionally, “Chronic sexual nostalgia detracted from [relationship] satisfaction over time,” though there might be a “chicken and egg” element there.