I used to wear two gloves because, as I am sure you would like to know, I am a very sweaty man and used to find it helped me mentally as I wasnt worried about the club slipping out of my hands. I first tried it when it was raining and I had on two rain gloves, played really well and decided to do it the whole time! It does make it amost impossible to not have a strong right hand grip though...
I don't understand how anyone can play without a glove though, I really don't.
Ironically Lucas Glover is one of the tour players who doesn't wear one. 
