It is this just-out-of-reach quality that lends affairs their erotic mystique and keeps the flame of desire burning. Reinforcing this segregation of the affair from reality is the fact that many, like Priya, choose lovers who either could not or would not become a life partner. By falling for someone from a very different class, culture, or generation, we play with possibilities that we would not entertain as actualities.

问题：请问play with在文中如何理解？