I'm not Polish, and I open boxes to see what I'm buying, but only the kind that can be closed again like Polska mentioned, and yes I inspect my eggs too. I also open shampoo or soap bottles and squeeze it slightly to push the air out and get a whiff of what it smells like. One time though I did squeeze it a little too hard and ended up with shampoo on my nose. ;-)
Doesn't everyone check the eggs? :)
I like to smell shampoo too! :)