[Man of Means]

Preflop, he normally would 3-bet. Get used to seeing these "deceptive" coldcalls in the SB. Sometimes 3-betting could be more deceptive since it looks like a standard blind defense with any Ace.

Can't say the opponent played terribly postflop - these things happen. Hiding in the woods on that cheesy flop, he figures you'll probably bet your ace-high and he can checkraise or wait for the turn to show aggression.

How to interpret your turn raise? A) You have ace high and are trying to smack down a stab at the small pot, B) You're making a free showdown raise, C) you actually have trips or a boat.

Of these three, C is the least likely, but 3-betting would fold a player with A or B, so I don't think the 3-bet is good in a smallish pot. Calling here and bet/call on the river is probably better, but it's a 1 BB difference.