what do you mean stupid?

the fact that you played your set passively into a flush board?
or
the fact you didnt have odds to draw to your boat/quads on the turn, yet called after he sent you a small message on the flop?

i cant let go of this one on the flop, either. but, i raise.

i certainly dont call the turn bet.

but, if i did, i cannot get away from the boat, either. i may not have bet out, but he would have, and i would have called, too.

set over set...not bad. its rare.

but, into a board with a potential made flush in it...and that aggression...might be a time to drop your set of 4's. different story if YOU had the TTT. top set is VERY different from bottom set.