"It's like the ebb and flow of every relationship," Aniston says. "It's hard; it gets easy; it gets fun again. What's hard to sustain is some ideal that it's perfect. That's ridiculous. What's fantastic about marriage is getting through those ebbs and flows with the same person, and looking across the room and saying, 'I'm still here. And I still love you.' You re-meet, reconnect. You have marriages within marriages within marriages. That's what I love