Parents never get it...or admit to getting it...the times I used to have my old car in bits trying to fit new parts, and I'm an IT Manager by trade, not a mechanic, so needless to say, I'd get stuck a few times. So he'd see me on the driveway (before I moved out), trying to figure something out, and he'd come out, have a quick look, say something along the lines of "you've got a perfectly good car, don't know why you're putting this junk on it..." etc, pretending to be disapproving, then disappear back in...only to appear 10minutes later with his tools (my dad was a pretty sh*t hot engineer/mechanic in his day), and pretty much push me aside he was that eager to get involved! lol