Lounging on a couch near the back of the room is a large retriever male. On the table beside him, you spot the doggy bone sextoy he took from you when you first met. But as you begin to think of a way to get your prize back, you find you attention drawn to his large sheath doggy cock, your goal of getting the toy back slips from your mind as you begin to wonder how much more fun the real thing must be.
Rex is first encountered in the High Rise District through the event ForcedAdoption. The player finds a Dog Bone which acts as a dildo which causes the Retriever infection. Using the dildo four times allows the player to receive an invitation to Rex's Place through finding the Forced Adoption event again. The player may be dominated by Rex or choose to overcome him, detailed in Karen's page.
Rex is not infectious, even during sex. Using the Dog Bone, however, infects the player with the Retriever infection.