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heard it on the radio , online the main articles say it's a 31 % increase in getting numbers .
http://www.dailymail.co.uk/sciencetech/ ... third.html
The article doesn't say it's a 31% increase in getting numbers. It says he had 31% success while holding a guitar. 14% when his hands were empty, and 9% when carrying a sports bag.
Either way though, he hit on only 100 women for each item, so this isn't exactly some scientific study. That's not enough, plus you could easily chalk up any increase in numbers to maybe the guy feels more confident when holding a guitar etc.
It doesn't really tell you anything. I play a bit of guitar and the only real way it has ever helped me with girls is that it's a great line to get them back to your house. Other than that I've found it pretty worthless. But that might be different if you are talking about a guy in an actual band performing for a crowd.