Two And A Half Men: Season 5, Episode 13

5 - 13: The Soil Is Moist

Alan begins dating a divorced woman (Christina Moore) who used to best-couple friends with him and Judith. He's happy until he learns more about Herb and Judith's sex life than he wanted to know. Title quotation from: Herb, describing how he plants seeds, which, to Charlie, sounds like a metaphor about sex.