I guess I'm not intelligent enough to get that humor.
Granted, Family Guy can be (well, actually... most of the time,
is) a little stupid as far as the humor goes. Still makes me laugh though.
Maybe Futurama has improved since I last watched it, I dunno. I watched a few of the very first episodes a few years back, and haven't watched anything from it ever since... so I suppose my opinion isn't quite valid.