Sirius shook his head seriously then, "Remus would never be an -- experiment" Sirius said defensively. James had always been Sirius' equal and Remus, even when they weren't dating, was someone Sirius took to defending. Since they had started going out though he had gotten increasingly more protective of the boy. Really, it was a wonder they hadn't been found out yet.
"I really fancy him." Sirius said, hoping to make James understand and accept this. "Are you alright with that?" because if he wasn't then -- well -- Sirius had no idea.