Full Tilt No-Limit Hold'em, $1 BB (5 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($128.20)
Button ($299.20)
Hero ($123.60)
BB ($104.90)
UTG ($174.25)

Preflop: Hero is SB with Q, K.
3 folds, Hero raises to $4.5, BB calls $3.

Flop: ($8.50) T, 5, K (2 players)
Hero bets $6, BB calls $6.

Turn: ($20.50) 8 (2 players)
Hero checks, BB bets $9, Hero calls $9.

River: ($38.50) 5 (2 players)
Hero checks, BB bets $15, Hero calls $15.

Final Pot: $68.50

My reasoning:

1) He probably thinks I'm FOS
2) I had been floating light recently
3) It was quite possible he had a flush draw, or weaker holding that would fold to any bet
4) The river c/c was to collect on missed FDs that wanna take a stab
5) He was aggressive enough to take stabs at it.
6) The bets didn't scream 'value'.