re: Poker & call the river bet?
Hate these trap hands, that's the one card that forces you to call. You've got over 2/1 odds
, you need to get this right 1 time in 3 to make it a profitable play long term. His river raise certainly implies flush, but he's your sole opponent, and would have to have specifically 2 spades to beat you (or KK), so i reckon, long term calling is +ev. He could have pair, 2 pair.
He's taken $12 from you and doesn't deserve it playing like that, but hey, that's poker etc etc