DES MOINES, Iowa — While other 6-year-old girls were brushing their Barbies' hair and dressing them up for convertible rides with Ken, Ms. Robin was hogtying hers. "I saw cartoons like 'Mighty ...

"I saw cartoons like 'Mighty Mouse' where they tied up the heroine," Ms. Robin said recently, sitting on a chair in her West Des Moines home ... BDSM group Central Iowa Power Exchange (CIPEX ...