There is a peculiar term used in the Ashley Book of Knots, a book so often referenced in knot making that it is commonly abbreviated as ABOK (per Wikipedia). The term refers to the spiral grove formed by the strands of the rope. One might have used the term groove, crevice, or cleavage for this; but no, the term is cuntline. My, those sailors. And, I've wondered if this isn't related to other terms that start with cun, like cuneiform. The root for this means wedge (again, per Wikipedia). So, I guess I'm a lover of wedges.