The most frequently cited hypothesis for why women fantasize of being forced and coerced into some sexual activity is that the fantasy avoids societally induced guilt—the woman does not have to admit responsibility for her sexual desires and behavior. A 1978 study by Moreault and Follingstad was consistent with this hypothesis, and found that women with high levels of sex guilt were more likely to report fantasy themed around being overpowered, dominated, and helpless. In contrast, Pelletier and Herold used a different measure of guilt and found no correlation. Other research suggests that women who report forced sex fantasies have a more positive attitude towards sexuality, contradicting the guilt hypothesis. A 1998 study by Strassberg and Lockerd found that women who fantasized about force were generally less guilty and more erotophilic, and as a result had more frequent and varied fantasies. However, it said that force fantasies are not the most common or the most frequent.