Scientists claim to have discovered what causes alcohol to make us find people more attractive than when not under it's influence. We have all experienced this phenomenom at some time while out on the lash and have blamed beer goggles for our 'lack of judgement.' Studies conducted at Roehampton University in London discovered that alcohol caused subjects to lack the ability to determine whether the picture of a face was symmetrical or asymmetrical. Symmetry has been attributed as the important element in what is widely accepted as an attractive face. Sober students made clear preferences for symmetrical faces but intoxicated students didn't. Women had the most difficulty which could be good news for ugly men! The reason given for women being more affected was that men are more visually oriented, in other words they letch more!
There may be some truth in this study but I would take it with a pinch of salt personally. The study was obviously set up to look at this factor specifically and therefore is not really objective. There may be other contributing factors that this study does not take into account because they haven't been brought in to play. The truth is excessive consumption of alcohol contributes to us making a whole host of bad choices and our choice of who we hook up with is just another regret after a night on the lash.