Forget changing a lightbulb – your grandmother can do that.
You need to know how to change a light fixture, unclog a blocked drain, change a lock and unhinge a door among many of the other typical household repairs that happen to be needed every now and then – regardless of whether you can afford to have someone else do it for you or not. You need to know how to mow the lawn, do your own laundry, iron clothes and clean up after yourself.
If you buy a DIY desk – you better be able to assemble it at home even if you’re using the instructions like you’ve never seen a screwdriver before in your life. All these things should be mastered by every man walking the face of earth but this doesn’t mean you have to change your day job to handyman – just know the basics and you’ll be able to figure out the rest as you go along.
You should also know how to research, purchase, set-up and use all forms of modern electronics and devices – but this is something you’re probably an expert thanks to your superior male genetics.