I threw up on Katy Perry

Fur a good cause ... Ruby Rose poses naked in Maxim / Pic: Maxim Magazine Source: The Daily Telegraph

Katy Perry drops in on a high school formal in Melbourne. She was with Ruby Rose at the time, and the night ended badly for both of them. Picture: Prusoth Yoga Source: Supplied

I'VE got acne. For the first time in 25 years I'm waking up to the sort of zits that would scare a teenage boy.

Why?

The short answer: I threw up on Katy Perry. And that's one of the reasons I've been off the grog now for almost 90 days.

Before you jump to conclusions, nothing horrific happened, nor have I been hit with a DUI - but I just had enough, and it has been one of the best decisions of my life.

Spots aside, I feel a much better person for it, so I thought that as we are nearing the end of the year it would be good to write down why being sober is phenomenal.

1. Drinking is expensive.

I can't say for certain how much money I've wasted on getting wasted but I'm sure the figure would hit me harder than any hangover.

Wine tends to be the weapon of choice for most Australians so using that as an example you can roughly calculate how big the black hole is: A bottle can set you back $10-$40 depending on the occasion, so a couple of glasses with dinner could end up costing up to $140 a week, or $7280 a year - and that doesn't include going out, special events or buying grog as gifts.

2. Drinking is not good for you.

Yeah, yeah, I know, a glass a day keeps the doctor away. However, those studies that highlight the health benefits ha! ve a dif ferent idea of what "a glass" means than perhaps most of us do.

In science, a glass is a tiny mouthful of wine, and if you can stop at that after opening a bottle, well, all power to ya!

3. You lose things when you drink.

Car keys, wallets, handbags, money, credit cards - they're all easy to lose after a few drinks, as is your self-respect and contents of your stomach.

I spectacularly lost dignity (and keys) one night not too long ago. Remember when Katy Perry and I crashed the year 12 formal? I don't. I had been off the grog for 30 days - my first attempt at sobriety - and I was out partying with Katy. What I do remember thinking was: "I'll have a drink tonight, I deserve one. I mean, what's the worst that could happen?" Well, not stopping at one drink, or ten, and then vomitting on Katy's foot was the answer. What was worse was I don't normally spew (I don't know why, I just don't), so clearly the universe wanted to punish me.

4. Hangovers.

NOOOOOOTHING is good about a hangover. That annoying song by Akon, Start Trouble - I love that I can imagine my life without ever having to wake up feeling like that again.

I'm gonna drink until I throw up. Well that's not good for anyone, which leads me to my next point ...

5. Drinking is NOT sexy.

Red eyes, smudged lipstick, a funny walk, potential slurring, forgetting people like their personal space and talking loudly - put them together and you don't get Scarlett Johansson. I realise now after having DJ-ed the club circuit sober how alcohol can turn a beautiful young man or woman into a slobbering creature from Middle-earth in just a few hours.

This is why Christmas parties are SO dangerous. I played a company Christmas party recently and more than few people there were topless by the end of the night (they do know those portable photobooths create a hard copy is kept of that and sent to the company as a delightful DVD, right?).

Alcohol can also be bad for relationships. I'm staggered at how large a part drinking played in my past relationships. I remember a girl threw a plate at my head once when she was drunk. She missed, but I broke up with her anyway (I really like my china).

Or take for instance my famous feud with my once-good friend Josh Thomas. He called me a c*** for running out on a bill, even though it wasn't really my bill. I can't hit back him back because I was drunk at the time. If I had been sober, I would have realised that nothing good comes out of going to a strip club at 3am.

I won't lie. Sobriety isn't all peachy. People you once loved have a tendency to be annoying when drunk. Dates can be awkward. You'll get called a bitter teetotaller (although, to be fair I didnt even know the word teetotaller existed until I quit drinking so there is a win). And getting back to those zits, I've upped my sugar intake since dropping the grog and it has played havoc with my skin. I've also put on five extra kilos. But all that is 100 per cent manageable because I like the person on the inside. She feels super healthy, and she throw won't up on pop stars.