I remember the first time I saw a mouse, (I think it was an amiga 500), I clicked the button and nothing happened. I remember thinking how does that work, event

I remember the first time I saw a mouse, (I think it was an amiga 500), I clicked the button and nothing happened. I remember thinking how does that work, eventually I found out :-). So, yes, there is nothing intuitively obvious about WIMP interfaces, though the amount of instruction required isn't much.