Things like can opener, knife sharpener, potato peeler.
I'm late 30's but grew up in a different country and we didn't have these in my house until I was late teens. My grandparents in the countryside never had them. I learned at a very early age to just use a knife for all these things and I can do it well , so bar the potato peeler (and even that one took me a while) I just stick to what I know.
OH is early 50's and English so he always buys /uses these things . It's a thing in our house because he moans I make the knives blunt, but then sometimes sheepishly asks me to open a can for him if there's no pull ring and the can opener broke again. 
We were talking today and he said he always had these things growing up , so it made me wonder.
Riveting conversation... I know.