Returning to dating—especially online dating—can be a frightening prospect for many women in their 40s and 50s. Sandy Weiner, dating expert and founder of LastFirstDate.com, discusses some of their biggest fears, one of which is safety. They are afraid that the people they meet are going to be dangerous or stalkers. Women also fear losing their independence. And they may be concerned that they are not young enough, attractive enough or slim enough for men to find them desirable. All these fears are common, but Ms. Weiner says that women can overcome them with the right attitude and approach to dating.