A tip; getting her sloshed increase your chances of getting lucky

I rather think that this has been common knowledge for a long time, but now there's ofeeshul veryfickashun that getting a chick drunk improves one's chances of scoring with her:


Alcohol can lead to unsafe sex: It's official

 

"Alcohol consumption, especially heavy drinking, has long been associated with HIV incidence. However, there have been doubts about the cause-and-effect relationship. Researchers weren't sure if alcohol consumption caused HIV via unsafe sex, or whether certain personality traits in individuals, such as sensation-seeking or a disposition to risky behaviour in general, would lead to both alcohol use and unsafe sex.

The study, published in the January issue of the journal Addiction, summarizes the results of 12 experiments that tested this cause-and-effect relationship in a systematic way. After pooling the results, the researchers found that alcohol consumption affects decision-making, and that this impact rises with the amount of alcohol consumed. The more alcohol that participants consumed, the higher their willingness to engage in unsafe sex."

Well, actually, I guess there's a predilection for sex already established, and drinking just makes it more possible to do it without protection.  But I think there's an obvious corollary that getting one's potential partner inebriated increases the chance of sex in general -- and since such random acts are unsafe to being with, whether or not protection is involved makes it even more unsafe at any speed.

OK, so how exactly did they test the relationship?  I mean, how were they SURE that this was true?