I've been with DH for 18 years now, I'm an engineer always have been. DH does a bit of carpentry but works 9-5 at a desk.
FIL: DH, how did you build the foundation.
DH: 99% built it,
I chat, loudly & clearly, about about scalpings and a whacker. FIL has selective deafness, ignores me.
FIL: DH, did you put a DPM down?
DH: Yes 99% did........
MIL: Just as our wedding was a merely a dress rehersal for her daughters, - she kept a file and 8 years later tried to book the same venue, caterers, even the flowers, then went for slightly bigger/more expensive, etc.
My DCs are used as a focus group for what will be popular with all the younger grandchildren.
Eg.MIL "do you like going to the aquarium?"
DCs - GC 1&2 "Yes we went with the school, loved the rays"
MIL "I shall have to take GC 3&4 or GC 5&6"
Now I've got my own family I find them more and more irritating. Gin takes the edge off to a certain extent but I thought I'd find them easier as I got older.