I searched around the web for posts about this episode of Girls, and I don’t think that anyone gets the major points at all.
Instead of trying to write a synopsis of this episode, I’m going to just get to explaining the major points that everyone else missed. However, I highly recommend Peter’s review of the episode.
The storyline about Hannah’s weird-looking old lawyer boss Rich who touches her inappropriately is mainly there for comic relief. It’s supposed to be funny that he keeps touching her in an outrageously inappropriate manner (I’ve been working for a long time and that stuff doesn’t happen in real life), and that she decides (prodded by Jessa) to just offer to “fuck” him. Hannah’s angry reaction when he declines the offer tells us something about the difference between men and women, and that is women expect that all men want to have sex with them, and they get extremely angry when they offer up sex and are turned down. In contrast, men expect to be rejected. After this realistic reaction from Hannah, the scene goes back to comedy, and Rich hilariously mocks Hannah when she threatens to sue him.
Jessa has only a minor storyline this episode. We find out nothing more about the mysterious guy whose kids she looks after. An old boyfriend calls Jessa, and Jessa amuses herself by getting him to go home with her and fuck her. He does it from behind, while Shoshanna watches. After the guy leaves, and Jessa discovers that Shoshanna was watching, Shoshanna is mortified and thinks that Jessa is going to be really angry at her for watching this intimate moment, but Jessa just thinks it’s funny that Shoshanna was watching her. I think that’s a pretty realistic reaction from both of them.
Now about the Charlie-Marnie story. We learn that Charlie’s friend Ray can’t stand her, and for good reason in my opinion. We learn that Marnie doesn’t even know Charlie’s address. Apparently Charlie has an apartment in some crappy neighborhood that he fixed up really nice with his hipster carpentry skills, but Marnie didn’t even have the address and she has to beg Ray for it. Marnie is desparate to get Charlie back. Because Charlie walked out on her, suddenly Marnie wants him again because she wants what she can’t have. She offers to give him a blowjob. Apparently Charlie accepts (I think that’s what was suggested, but either the actor who plays Charlie has a no-nudity clause, or HBO thinks the world isn’t ready for naked penises). This turns into more regular sex with Marnie on top, and then Charlie ruins it by saying “I love you.” Once Marnie hears those words, she gets disgusted by him again and breaks up. I hope we still see Charlie in future episodes, because he's my favorite character on the show.
And now for the best scene in this episode. Hannnah, pathetically thinking that Adam is her boyfriend, goes over to his apartment, but he lets her know that he’s not her boyfriend. She goes into his bathroom to cry, and then when she comes out, Adam is lying on his bed and masturbating (and once again, no shot of the penis). Adam tells Hannah she can stay until he finishes, and then it’s slowly revealed that Adam has a humiliation fetish, and Hannah awkwardly humiliates him, and takes $100 from his drawer as part of the humiliation fantasy.
The Adam scene confirms my suspicion that Lena Dunham has been getting her ideas from surfing the internet. She has read PUA sites like Roissy, and she has also come across fetish porn, and the scene with Adam is based on humiliation fetish porn. Commenters who previously said that Adam is an alpha are clearly wrong, no alpha would get off on that fetish. Stupid people who wrote reviews on other sites are also wrong about Hannah becoming more dominant in their relationship. This is just another example of Hannah indulging one of Adam’s weird sexual fetishes and not getting what she wants (and what she wants is not $100, but to have a real boyfriend). I suspect that the running joke for this entire season is going to be that Adam does weird stuff each episode, and Hannah just puts up with it.