The Sims were made with a lot of custom content (NOT included in the download). The readme has everything you need though, including the links to MTS (Modthesims.info) and Sexysims2. You just have to download and install.
The guys have genitalia as well: (from sexysims2.com) if you don't already have them in your TS3-collection:
Anders' body is still a WIP but Jowan is ready for action. ;) That's how I imagine him, as if taken right from one of my stories... not only his body but his dangly bits as well. He's uncut and the foreskin fully covers the glans and then some for a bit of overhang while the skin almost completely retreats behind the tip when erect.
This is the best penis model available for Sims 3. It's anatomically correct, it comes in many adjustable flavors (cut/uncut, big, thick, small, thin, size of balls, etc.) and even has an urethra opening where most other models look like cheap rubber dicks. It's poseable from flaccid to fully erect with a slider as well, including a visible retreating foreskin. And that looks really natural and realistic.
Anders' body will be further changed: he's going to be noticeable different from Jowan who's slimmer. Anders will have stronger defined muscles and more body mass in the end. I'm going to change his bodyhair some as well and will remove his pubes to a full/partly shaved look. He's circumcised and thicker but a bit shorter in size than Jowan when flaccid. I'm still looking for body piercings for Sims 3 'cuz he's meant to have a small, single nipple ring, on the left side.
The three Sims are made for a single household and they're meant to be lovers. Nury is set to straight while both guys are bisexual. I don't know if love triangles are possible in Sims 3 though. Just try it out. ^^
You can grab them here: