Toward the end of my relationship with my now ex, while we were still trying to act as if things would get better, we went out looking at stereos (as the patched together lashup we had since college had finally given up the ghost) . . . . we did some comparison shopping, and she brought up some information and brands I was a little surprised she knew about . . . .
Turned out, the info was coming from a fella that she would later marry, after she and I divorced.
We remained on cordial terms, as neither of us was particularly at fault for the split . . . . just one of those things.
Oddly, a couple of years later, she contacted me, asking me my advice in the search for a new car . . . . .I chuckled that, as her EX husband, my intelligence had suddenly increased to more than that of her then husband.
I chuckled.