From the episode, "One Little Word"
Stan: Francine, did you hear what he said?! I'm his new Number One! This is a huge deal! I feel like the sun is shining on me for the first time in my life... like a baby flower or a pale goblin-like creature awakened from its subterranean slumber by mining activities.
Roger: He started it!
Stan: So you were gonna drown him in the lake?!
Roger: Well, how do you kill babies?