Who's going to yield?

As the saying goes, "When life hands you lemons, make lemonade." For many days now, on and off but mostly on, we've been handed rain, so of course I photographed snails! (No, they did not end up on my plate.) I brought these two guys/girls (I think snails are hemaphrodites) up to my balcony for a photo. I placed them on the railing facing each other, and they 'argued' a bit about who would yield. One just slid down the side of the railing and let the other pass, how civil.