I just watched Lynn's excellent 3 part video on honing. I see that when honing the direction of travel is edge first, but when stropping, its spine first. I can see why one would not want to lead with the edge on a leather strop, but I am curious as to why you wouldn't/shouldn't go spine first with the stone. I'm sure I'm missing something obvious here, so apologies in advance for what is most likely a newbie question.