Interesting. What are the odds of this?

the key to my brother 71 Cougar XR7 (351 cleveland ) fit my friends mothers 77 T-Bird . And the key to my grammas house unlocked my buddy front door .
When I worked for an Acura dealer in 2003 I went to drive a new White TL-S and it wouldn’t start … it work crank but not fire . I thought thats weird… these cars never fail to start . I checked the key tag and it said ( White 3.2 TL-S ) but then I checked the stock number…. It was the key for another white TL-S ! Got the correct key and she fired right up .