Not perfect pitch, but...
I'm 53 years old and have for sure never had perfect pitch, though I've always had very strong relative pitch, and am a competent musician. I never cared a whole lot, though I did periodically try testing myself for fun over the years, and always failed.
I'm generally happy to hear music played in any key, they are very equal to me.
But... in the last year I noticed a quirk. For some reason, I can always remember the exact pitches of the treble synth riff in Michael Jackson's "Billie Jean", which goes like this https://mascii.org/e#u9yVkq6gp6Cn4JoIpkCwRsEtyQFNkEvRXSFFIU0hXcFNwUXBWSFFQaFGAU0IAA
Any time I think of that one tune, and only that one tune AFAIK, I can always accurately remember the starting pitch of that riff. I've gone months without hearing it or thinking of it, then one day I'll test myself and it's always spot on. I've randomly tested myself probably 15 times now over the course of a year.
I don't know what to make of this, nor what it is about that tune. Maybe the characteristics of the synth sound? Maybe the parallel fourths it's playing? Maybe because I've heard it since childhood?
If someone were to play that song in a different key it wouldn't bother me, I probably wouldn't notice. But now if I hear a car horn or something and am curious about its pitch and I'm not near a piano (a rare scenario since I have a piano app on my phone), I can figure it out by calculating from that song since I know that song is in G minor.
This trick is basically useless. I imagine having true perfect pitch could be useful for quickly figuring out complex passages upon hearing them, but I don't think I'll ever have that kind unfortunately. Still, makes me wonder if I could find 11 more tunes and eventually develop a sort of sense without having to rely on relative pitch calculations.
I'd be curious to hear from someone with true perfect pitch if there's something about this song that makes it more amenable to being remembered in that absolute way?