The average person replaces this household item every 10 years… What is it?

i'd  say  a  bed  too … either  that,  or  a  vacuum-cleaner?

a spouse?

Their wife

Does it require that they be "average"?

And it would be a bed..

Bedsheets

A giant sombrero!!

Stove or refrigerator

all household items?

Mattress

Mattress?

Toilet brush

Toilet brush

Bed

everyone was right. all those things are replaced every ten years

Bed,sofa

Toilet seat

Probably a stove or refrigerator. These new appliances are trash and don't ladylike the old good ones did. It is kinda ridiculous how unservicable and made to replace appliances are these days. Used to by one in your entire life nut not anymore.