Mostly this show is about getting in some pop culture reference from at least 10 years previous. Most of the time there's not even an actual joke associated with it, it's just so older people can go "Ha Ha I remember that: (choose one) commercial/tv show/song/news event/food/fad/movie/celebrity/monkey throwing poop"
Stewie is sometimes funny, but it's not worth is slogging through the entire show for one funny moment that won't even make you laugh out loud.
And don't say I don't get it... Because I get it. It's just not funny.