Kif getting pregnant is hilarious. He's eager to have the baby, Amy's parent's are eager. Amy's about to freak out with the talk of commitment.
I was tricked when Amy stormed out on Kif when her parents converted her party board into an ironing board and we hear crying. I figured Kif's baby just dropped out of Kif on the floor. But, that cut to Zoidberg bawling was hilarious.
My favorite line is when Brannigan tells Leela that their love has had to deal with her costant hatred, and now this (referring to Kif's pregnancy.) That's pretty hilarious.
All the pictures in Kif's cabin were kind of creepy. I would definetely run away from someone who did that. :p