CAN YOU EXPLAIN BEES?

It is a warm day. We sit in the conservatory, with all windows and doors open. A bee blunders in. He decides he is in the wrong place, and hurls himself at the nearest window. He seems baffled by the fact that he cannot push through the glass. However, he determinedly chooses another window, with the same result. And another...and another...and...

What he never seems to do is to fly out through the wide-open door, even though he sometimes flies right past it. Eventually, when he is reduced to a quivering bundle on a window-ledge, I take pity, scoop him up, and release him into the outside world, where he seems to fly off with relief.

How is it that an animal that is bright enough to be able to build a honeycomb based on angles of 120 degrees (a task that would baffle a lot of our children) seems unable to understand that open doors work both ways?