Sorry, but I was raised in a very tool-friendly house where this was instilled in me. However, when I was a teenager I still managed to lose tools in the trunk of my car or wherever for a few months. Long enough to need replacing. I don't think this is in any way an indication that my dad failed as a parent. I think it's just an indication that sometimes life can get busy and cleaning up after yourself everytime doesn't always happen.
I've done that with my own tools, as an adult. I have not observed that being a specific age makes this sort of thing more likely. To avoid losing your tools, make anyone who uses them agree to put them away immediately after use (yourself included).
