Can any one tell a newbe what direction my fletching should face for a left handed shooter. I'm confused over left right & streight

I have been told that it doesn't matter. I'm a lefty, and I shoot left wing fletching. The only reason why is because the guy that does my arrows only does left wing. Most people prefer right wing simply because they say that on impact, it will keep your broadhead tight on the arrow whereas left wing won't. I put a little bowstring wax on my points and I have zero problems with my tips coming loose using left wing fletching.