Light-hearted.
I started thinking about this after reading the recent “snapped and farted” thread, which cracked me up - not the subject of the thread itself, just the initial typo - it almost had me in tears and I've laughed each time it has popped into my head over the past week or so. I’m aware that many posters didn’t find it funny at all - when I showed the post to DW she just sat stony-faced, which cracked me up even more.
Anyway… I remember reading a joke in a newspaper ‘daily diary’ type column around 20 years ago - it was a pun on the names of Star Trek actor William Shatner (Captain Kirk) and Fleetwood Mac singer Stevie Nicks, and it went like this: “If Stevie Nicks married William Shatner, would she be Stevie Shatner Nicks?” (stops typing to wipe away tears of laughter).
Now, I don’t think of it that often, but it does come to mind a couple of times a year, and it still creases me up every time (particularly when, on repeating it aloud, I get the same stony-faced response from DW each time). So, AIBU…
You are being unreasonable: get over it, stop torturing your poor DW with an old joke which wasn’t funny then, and isn’t funny now.
You are NOT being unreasonable: it’s funny, and laughter is good for the soul.