Walsh: We tried to keep them very different. We did the experiment first because we did want the experiment to be as true as possible, and not have the creative side get in the way of it. This is the best way we knew how. Each time we read each other's, we're reliving the day in a way. In some of the more emotional days, it brings back everything. It hasn't been easy.
CNN: The rules are quite fastidious for something so unpredictable as a relationship.
Goodman: We knew that if we didn't have rules in place, it would be very easy for us to skip by. The rules held us accountable.
Walsh: It's kind of a theme in the work that I do, I always set constraints. The best outcomes come from restraints. Forty days is also the amount of time in several religions that it takes to break a bad habit. The couples therapy was one stipulation that I really wanted. It was amazing week to week to have that hour to sit down and really be able to reflect and have a third party to help you organize and sort through what happened and give you that objective advice. I honestly don't think we would've made it through the 40 days without it.
CNN: In the early days of the blog, your friends criticized you both for not being physical. You left those constraints pretty ambiguous. On day 25, readers learned, that changed.
Goodman: We had left that open. It was bit of an issue right in the beginning because her friend was giving her (a hard time) about it. She got weird about it. We can't just click our fingers and be in a relationship. There was a lot of push and pull because of it. I didn't know what my intentions were.
Walsh: I had wanted it for a while. I was just like, "Let's try this." We both admitted on day two of the therapy that there was attraction, there was some interest. Tim was the one that was super scared because his issues are quite real. We had a great friendship, so he was very, very hesitant -- but it was confusing for me because he would be flirtatious.
CNN: So, do you think men and women can ever be just friends?
Goodman: I have girlfriends that I consider just girls who are friends now, but it's only because I've been with them before or they're in a relationship so you don't have to even think about it. If you asked me a couple of months ago, I would've said yes. In one of his stand-ups, Chris Rock said every platonic friend that he had was someone he was trying to sleep with, made a wrong turn somewhere and ended up in the "friend zone." I think there's truth in that. A man always has a motive.
Walsh: I do.
CNN: Well, what happened?
Goodman: I will say that I feel forever linked to her. I have this kinship with her because of it, regardless of what happened or if we're together or we're not.