random thought: I wonder if there's a safe or safe-ish way to build a male to male "suicide cord", if you somehow make it so that the middle circuit isn't actually completed unless some condition is fulfilled like "there's x amount of pressure at 3 points on the surface that the plugs stick out of"
oh wait, no, there's not!
because if you plug the female end of xmas lights into this hypothetical thing, no matter how safe "it" is, there is now an exposed hot male end of the suicide cord, as illustrated here:
my original idea is still good though, which is something that looks like a suicide cord (though explains on the packaging that it's not) but actually there is no connection between the respective ends and when you plug it in it just plays xmas carols