Eli Mae, when you skateboard or snowboard or wakeboard which foot to you place forward???

I wakeboard/snowboard with my left foot forward... I dont know if the same holds true for surfing or not BUT the way that you find out your natural "lead foot" for this stuff, so I am told, is as follows... Lets say you have on socks and your on a slick floor and take off running AND then your going to slide. Which foot would you place forward when you go to slide on a slick floor??? That is how I was told that you can find out your lead foot for snowboard/wakeboard/skateboarding...

Eli/anyone, does the same apply for surfing and your "forward foot"???