abs anal anal_penetration anthro balls biceps blush bodily_fluids brother brothers duo ejaculation erection foreskin genital_fluids genitals humanoid_genitalia humanoid_penis incest_(lore) male male/male muscular muscular_anthro muscular_male navel nipples penetration penis quadriceps shower sibling smile triceps tuft vein veiny_penis wet bird_dog canid canine canis domestic_dog golden_retriever hunting_dog mammal retriever attempted_signature hi_res
His older brother thrust into him fast and hard, while his hands explored with toned body. The sensation was euphoric and he felt like he was ready to bust. what sent him over the edge was his brother whispering all the things he wanted to do to him when they got home.