NOTE: I'm asking in Inkscape. The problem could have been solved in Adobe Illustrator, but it doesn't relate to a solution in Inkscape.
I want to add two arms over the same object and overlap them,
but I have the problem that when I want to add the border of the object I get that they cross
I want to put it like if one of the arms is over the other so the border of the one that is "down" can't be seen. How can I change this?
My group of layer is this: