When coming upon ‘something interesting’ the mind seems to go into ‘discovery mode’.
It wants to absorb everything there is to know about that interesting thing.
Gossiping is also a discovery mode.
Browsing wikipedia another.
Studying an interesting subject also.
This is why uninteresting subjects are much more difficult to study: there is no discovery mode.
Discovery mode is initiated by desire.
A desire to know.
This is often not an act of free will, we get sucked into it by the power of mind.