I think this was a joke, guys...
But the real reason, seriously speaking, is that second string QBs often have built knacks with the second team WRs, since they work together in practice. Don't quote me on this, but I believe Bennett worked with the 2nd team last year (or did McCariens) in practice and thus, Volek feels comfortable throwing the ball to Bennett. It's just that he's so used to seeing and passing to him as a safety valve in practice, that he'll naturally incline towards him in faster game situations, as well.
Another example is TJ Houshmandzadeh's emergence in Cincinnati, which has been consistent with Carson Palmer's coming out party. Carson worked with the 2nd team last year with Housh, while Kitna developed a battery with CJ and Warrick. As you may have noticed, as the year went on, Carson Palmer has gone to Chad more and more (along with TJ, still), as he gets more comfortable and confident with Johnson as his wide receiver.
"The son of Bobby Bowden once again proved he's as predictable as a Julia Roberts' movie.
And upon further review, just as sappy, too."
-Naples Daily News