Does exist something during the selection when you have make a first choice (Object, Face, side, curve...) except the "general selection"
Existing : first selection, you move over something that "enlight" and you must click for select
It will be cool if that selection will just after the first click "move over" + Shift (without click) = Selection ! (and keep of course the click for unselect / select single thing )
It's more easy to press or keep pressed a key than a click (pen graphic has generally one or two button = shift or other key) for don't touch the keyboard :)