You know, that thing you can do which others cant but which is surprisingly useless.
Mine: I tie shoelaces upside down which is great if I am tying someone else's shoelaces but means my own are upside down (ie loose ends at the top of the knot). This was a useful skill when DCs were little but now they are in their 20s and dont need me tying their shoelaces.
DH: putting up coving - he can just see all the cuts he needs to make so there is almost no wastage. The house is perfectly coved. We dont redecorate often enough for him to use this skill.
Anyone else have a pointless superpower?