If Plastic Surgery Won’t Convince You, What Will? By DAN BILEFSKY PRAGUE — When Petra Kalivodova, a 31-year-old nurse, was considering whether to renew her contract at a private health clinic here, special perks helped clinch the deal: free German lessons, five weeks of vacation, and a range of plastic-surgery options, including complimentary silicone-enhanced breasts. “I would rather have plastic surgery than a free car,” said Ms. Kalivodova, who opted for cosmetic breast surgery that would normally cost €2,600, or about $3,500, as well as liposuction on her thighs and stomach. These were physical enhancements, she said, that she could...