Let's 2.5 Men this:
The plot revolved around [Alan] being spoiled by [Charlie/Ashton] regarding a plot point in a Harry Potter book (not nerdy in the slightest). In response, he decides to move out, into [current whats-her-face]'s apartment. This opens up the door for [current slut] to move in to [Charlie/Ashton's house]. Ultimately, the issue is resolved by [what's-her-face] and [Charlie/Ashton]'s mutual desire to not live with their S.O., and status quo being returned. A subplot involves [Jake] being forced to spend the weekend with [Charlie's mother], who smothers him much to his discontent. [I dunno, some minor characters, maybe Judith and Herb] attend a retreat for [Judith/Herb's] company and attempt to have Cirque Du Soleil sex.