[VBprogrammer]

Weird, I'm also mid-30s in the UK and stone is my native person weight. As well as pounds and ounces for babies.

That said, I have a reasonable intuition for the conversion factors. Enough that I wouldn't have to run to Google to understand the jist of the story.

[nikanj]

And the memes still claim that the UK is metric.

[weberer]

So is the USA on paper

https://en.wikipedia.org/wiki/Metric_Conversion_Act