[scns]

Taste sensitivity declines with age. Strong flavours like smelly cheese are disgusting for kids but enjoyed by older adults.

[fauria]

They are enjoyed by adults who acquired that taste: https://en.m.wikipedia.org/wiki/Acquired_taste

For instance, it would be really hard to find anyone, no matter how old, who enjoys surströmming or hákarl without having become acquitted with them.

[wizofaus]

Acquainted :) Though perhaps they are used as part of the Swedish justice system?