Predictably, the pair have been accused of selling out, which I don’t buy – it’s a visually exciting, interesting project, which they’ve put a lot of time and energy in to, and it’s been hugely successful, so why shouldn’t they reap the rewards? That said, the ending is so well timed and poetic – they part ways at 11.58, Day 40 – that you wouldn’t have to be a cynic to wonder quite how staged the whole thing was.But, does it actually tell us anything about relationships? 5) They wouldn't see, date, or hook up with anyone else.

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Tim and Jessica's new book "40 Days of Dating" is on sale now in bookstores everywhere.

And despite their story not having the Hollywood ending that perhaps we all hoped for, Warner Bros. They're also working together on another blog about a brand-new experiment -- and if this project is any indication, it's sure to be a good one.

and that was kind of depressing." Less than three months after breaking up, Tim and Jessica launched their blog -- and it went viral.

That meant having to do a ton of appearances together, which wasn't always easy for them, considering that their friendship was on the rocks.

Before I continue I should warn you that their couples therapist, her personal therapist, and their joint musings based on all the years of therapy they’ve previously had, feature heavily throughout the blog.

There were certain rules attached to the experiment.

Throw in a comically overbearing mother and you’d have a Richard Curtis film on your hands.

Admittedly about 80 per cent of the relationship peril could have been avoided if they stopped obsessing over every little thought and feeling they had, and then discussing it in therapy. So compelling that the blog started to go viral – after the first couple of weeks - with up to 300,000 people a day were tuning in to see if they were finally going sleep do the deed.

In March 2013, graphic designers Timothy Goodman and Jessica Walsh, two longtime friends with completely different approaches to dating, decided to test if people can coax love by forcing themselves into a relationship together. 6) They'd document their experience by filling out a daily questionnaire (which eventually were published on their blog months later.) While their experiment had its ups and downs, the story ends in a marriage -- but did they marry each other? I didn't know what my intentions were at that time," Tim admitted.

They called their experiment "Forty Days of Dating." They agreed to a number of simple rules: 1) They would see each other every day. Huff Post Live sat down with Tim and Jessica to not only discuss their "40 Days of Dating," but to also find out what's happened since. Even though they had their fun -- especially on the day that they decided to hold hands for eight hours straight -- things became tense between the two when the line between their friendship and their experimental relationship began to blur.

They both treated the whole thing fairly analytically at first, like a science experiment with cocktails and cutesy little notes they write to each other before their dates.