I'm pretty sure that's me, too. I never sing though, because it's too embarrassing even when there's no one around.

/sigh

That's a bummer. Did you ever take piano lessons? Personally, I think that should be a mandatory requirement for children, whether they like it or not. IMO, it's just as important as mathematics and reading at a young age because music is not only math, it's repetition, which is good training for young minds.

Totally agree, but I'd add that music includes math (durations, fractions), language (written music is essentially a foreign language), technical aspects (embouchure and fingerings)... experts say it's the only thing in school that uses both sides of the brain.

Nope, I can't read music or anything. I just pretty much listen to it. To be fair, I did hear differences in the test that the OP linked, but I didn't feel like going further after the first 30. But yeah, music is a huge weakness for me.

Am I tone deaf? Yes.
Am I a god damned board certified crotch rocking stadium filling shower singing sensation? You bet your sweet, sugary tits my bald headed friend.