Plumbing is one of them. Every time I have attempted a plumbing repair, it has ended up costing me more than if I had called the plumber in the first place. The other day, the garbage disposal was hung up. Turned out three pennies were jammed inside. How three pennies, now rather mangled, got into the garbage disposal is beyond me.
Children are likely the key culprit.
They're always guilty of something. I'm willing to dabble in electricity to a limited extent. I can install a ceiling fan, replace a light switch or wall outlet, but anything more complicated than that requires someone with a license. I don't mess with cars, since I attempted to change the oil in my 1978 Toyota 20 years ago and unwittingly drained the transmission fluid instead. The first clue should have been when I went to fill the crankcase back up with oil and it would hardly take a quart.