Oh please do. With something like an audio cable at least there's one end that is purely sticking out and one end that is purely sticking in. But with a lot of

Oh please do. With something like an audio cable at least there's one end that is purely sticking out and one end that is purely sticking in. But with a lot of other cables there's a mix of inny bits and outy bits and it took me a long time to work out which bit I'm supposed to pay attention to to make the analogy work (the answer is to pay attention to any visible bits that carry a single/power. If this is obvious to you I suspect it was just because of how someone explained it to you, but if you're just brillianter than me then great!).