Three people take extreme physical and psychological measures to live as full time human dolls.

Meet Nicole who has been addicted to pony play, a form of role play, for the last 20 years. Plus, Heather, who is compelled to drink paint.

Meet twins who are so addicted to being identical that they weigh their meals to stay the exact same size, and a woman who eats mattresses.

44-year-old mother Lacey has had at least 30 plastic surgeries and is planning more.

22-year-old Keisha is addicted to chewing on urine-soaked diapers. Plus, meet 50-year-old Vladimir who is addicted to using leeches.

Robert consumes up to 16 plastic bags every week. Plus, 48-year-old Catherine can't part from her plastic doll. Can she ditch her addiction?

A 33-year-old man spent over $100,000 on surgery to look like Justin Bieber. Plus, meet a 22-year-old woman who can't stop eating makeup.