Used and Rare, Collected

Dave and Archie are happy. They work in construction together, they share a couch, pizzas, beer, and usually a bed. Desmond and Wyatt are happy. They share a home, a love of books, and a lifestyle that's heavy on power exchange. When Archie sends Dave to build book shelves for his old friend Desmond, Dave is happy to oblige and doesn't even mind the initial misunderstanding about his relationship with Archie-he's even amused by it.
But when things get twisty between the four of them can Dave keep it from getting kinky and still keep everyone else happy? It's difficult being the only vanilla cookie in the jar.