Dan was born Down Under but qualifies for Scotland through his maternal grandfather, who was born in Ayrshire.
Dan played against the Aussies twice in the Scots' summer tour and was in the line-up which went down 31-14 to the visitors in the first Test almost two weeks ago at Murrayfield.
When the 26-year-old lines up against the Australians in the third Test in Glasgow it will be another poignant reminder of his birthplace.
Dan said: "There was a lot of emotion a fortnight ago, and it will be the same again this week. This will be my fourth Test against Australia, and four of my last five caps have been won against them - which is good fun.
"I am getting more and more used to it, and it is good to play against them. But it would be good to get a win this time.
"I have had a few emails from people back home, and there has been a bit of banter. But all in all it has not been too bad."
Dan will win his 10th cap at Hampden and the stand-off insists he has came on leaps and bounds since making his first start against Ireland in the RBS Six Nations Championship this year.
He said: "I am a more complete player, and a lot of it has to do with confidence. When you first come into a Test you are not sure how you are going to handle that level - but at the end of the day it is just another game of rugby.
"Sometimes you can get away from that and think 'I have got to do something different'. But if you play as you do week-in and week-out - which is what got you there in the first place - then you will be okay. That is one thing I have learned.
"I came back from Australia after the summer tour and got back into training, which was really good for me.
"I lost a bit of weight and I feel a lot fitter than I did last year, so I am feeling more confident. The more Tests I play, the stronger I feel - and it makes it easier."