An even harder thing to do is to lay down a set to a better set.
Recent hand I hit a set of 3s and ran into calls on the flop
and turn. I stared at the board and there was 3 J 7 staring back.
I knew something was wrong as my turn bet was 10-12xBB.
Nevertheless, I pushed AI and got called by a set of 7s.

Regardless, I am never laying down a set unless there are pairs
on the board, a flush or a clear straight.