Opportunity to hone her sex skills because she wants to keep moving forward, to learn new techniques and tricks that will make him moan and shudder with pleasure, to experiment with different positions and toys that will stimulate all his erogenous zones, to develop stamina and flexibility that will allow him to have sex for hours on end without tiring. She wants to be the best lover he has ever had, to make him addicted to her body and the way she makes him feel. She wants to always be one step ahead of other women, to surprise and delight him at every opportunity.