Seth Rogen said a healthy relationship involves partners who love each other, treat each other kindly, and are sexually attracted to each other. Stephane Cardinale - Corbis/Corbis via Getty Images Seth Rogen says relationships last when couples adapt to "new parameters" and "new boundaries" as they grow. He said he and his wife are "very different people" now compared to when they first met in their 20s. "But we grew in a way that we stayed very compatible with one another," Rogen said. Set...