I'm excited for you - this knot works incredibly well at staying tied, but what's even better is that compared to the standard "double knot" this is much, much easier for you to purposely untie - simply pull the string like the "traditional" knot.

Now, maybe that would have been a flaw with that pesky prankster brother of yours around, but I bet it'll be a positive now. Try it!

Every person has many such events in their childhood. Just previously we called that "learning", now we call that "victim" and "PTSD".