After struggling to fit into the house for days, he realised the girls were a better mix for the housemates and it was time to take action.
“When they came in and slotted in so easily it was only then that I realised ‘I’m actually not fitting in.’ So I accepted it as part of the process,” he told TV Tonight.
“It wasn’t that I was just an Intruder (that I didn’t fit in). There was something particular with me.
“It was the moment when they scored equally well that I saw through that process that they both wanted it so much and it highlighted that I didn’t want it anymore. I’d lived the dream of being in the house and pushed myself psychologically.”
With that revelation he walked to the Diary Room to tell Big Brother he was quitting. He was so firm on his decision that he declined an offer to speak to the show’s resident Psychologist.
“I said I didn’t want one. Because I gave them level-headed reasons, Big Brother said ‘I can see that you’re serious.’”
That discussion with producers took place last Friday, requiring Nathan to stay silent on his decision for 48 hours with his housemates. He even proposed the way his Eviction should take place.
“I knew that people had paid money (to vote) so I didn’t want to stuff that up and I knew they needed an Eviction moment. So I put on my little producer hat and said ‘How about you do the Eviction and I say I will give my spot to you?’” he explained.
“I’m sure they would have thought of it anyway, so I don’t want to take credit.
“They said ‘The Eviction will be on Sunday, so don’t tell anyone. Keep your poker face on for 2 days.’”
His Eviction was filmed on Sunday in readiness for the Monday broadcast.
During that 48 hour wait, while keeping his news a secret, he still had to participate in the weekly challenge, a Rock Paper Scissors challenge which saw housemates tied to one another for several hours.
But having made his decision, he then found the inner strength to confront those he had trouble with.
“It took me knowing I was leaving to grow some balls and being tied to Tim and Tahan that I knew they couldn’t escape from me. They had to listen to what I had to say.”
Nathan, 35, says he entered Big Brother having been a fan of the show since the first series. It was a personal ambition to be on the show, as well as the possibilities it offered. But he struggled to fit in.
“I wanted to get a break in the Entertainment industry. I’m a jack of all trades. I didn’t think I was particularly good at anything but I thought I’m good at talking to people and making people laugh, naturally,” he said.
“So I thought it would be a good fit, but I just couldn’t bring that side out without referencing songs or being filthy or without people understanding my references.
“I knew I wouldn’t be able to reference music but I thought in the banter I’d still be able to make them laugh.
“I just tried to be natural, to be myself. I know when I try hard to make people laugh, rather than it coming from a natural place, that I’d just come across as a tosser.
“It was a struggle the whole time to remain positive and natural, if that makes sense.
“As I struggled to find my way I became more and more withdrawn. Towards the end I think they were fed up with it. I didn’t count on Tim, Drew and Tahan getting to me as much as they did. I thought if I had more support I would have overcome that.”
Frustrated by a lack of music, he was even told off for whistling a Strauss classical melody.
“I thought ‘It’s the 16th Century. Surely you’ve got copyright for that?’ I can’t even whistle that?” he laughed.
Rules against swearing also dogged him. A moment in defending the Sugar sisters got him into trouble.
“I went into the Diary Room and said ‘Australia I think you’re f***ing stupid.’ And Big Brother said ‘You can’t address Australia and you can’t swear.’ So I said ‘Ok, Australia I think you’re incredibly stupid for voting those girls out. They are beautiful. What qualities are you rewarding?’” he asked.
But he denies his sexuality set him apart from the housemates.
“I don’t think any of that was really a problem,” he said.
“Ben got all my references. He loved the 70s and the 80s and we’d laugh about Carol Channing. But they were ‘Carol who?’ So we bonded on that level.
“I began to realise if I’m not funny I’m going to be the sook in the house. So I was very conscious that would be my storyline.
“The only reason to stay was to win $250,000 and that just seemed too far down the track to even think about.”
His exit on Sunday triggered all kinds of Social Media reactions and there were efforts to keep his identity secret.
“When I came out of the house the Producer smiled at me and said ‘Mate that was great TV!’ Not just because of my exit but because everyone was so traumatised by having to vote in front of people.
“They gave me a cigarette but while I was sitting there puffing away the steam train from Dreamworld came past and everyone craned their neck and I thought ‘Why am I standing here? Everyone’s going to see this!’
“People are saying I was being consoled, but we were just chatting. I find it funny people say I couldn’t handle not smoking.
“Then I came to the Hilton and had to walk with a towel wrapped around my head.”
He spent the day in a hotel room with his sister, declining to answer messages from puzzled friends until they had viewed Monday’s episode.
But now he’s out he talks with few regrets. He got to live his ambition, leave on his own terms and while he doesn’t care to be seen as a ‘martyr’ is happy that a female Intruder got to take his place.
“I understand people will think I gave up or that I was trying to look good. But the whole way through I tried to be in the moment and react naturally, which is the most impossible thing to do when you have cameras on.”
Big Brother airs 7pm weeknights on Nine.