Scraped knuckles... why?

This one has been bothering me for ages...
Every time I go surfing, I end up with scrapes just below my fingernails and above the first knuckle...
I thought it might be my gloves rubbing - but, no, happens in summer too.
Or maybe waxing the board, but, no, not that.
Maybe Im a caveman and rest my knuckles on my board as I surf? Possibly, but Im sure someone would have mentioned it.
So, answers on a postcard (or better still, on this thread) - What does Drownin' do to his fingers every time he surfs?
Every time I go surfing, I end up with scrapes just below my fingernails and above the first knuckle...

I thought it might be my gloves rubbing - but, no, happens in summer too.
Or maybe waxing the board, but, no, not that.
Maybe Im a caveman and rest my knuckles on my board as I surf? Possibly, but Im sure someone would have mentioned it.
So, answers on a postcard (or better still, on this thread) - What does Drownin' do to his fingers every time he surfs?
