Q. WHY DO YOU NEED ME?
A. Well, let us answer that with a few questions...
1. Do you remember reluctantly calling this parent on numerous doubtful occasions to ask for advice or to confirm they were unfortunately right?
2. Did your facial expression look exactly like this when listening to the "I bloody told you so,/Why are you so hard of hearing?" lecture?
3. Or perhaps you made this call once and never bothered again and happily experienced life suffering in silence :)
Either way - I'm sure this will bring back a few memories for both you and them!