Not all words were literal, but some things were not wise to say around Sirius on a bed, when one was getting shagged by him on a regular basis. Remus was familiar with how Sirius got on regularly - with James and the like. And this time...this situation...why would it be any different? Sirius had taken it literally, and it was brilliant fun. And fun was always good when he knew his knots.
His kisses kept coming in the meanwhile, though Sirius meant to explore more in just a little bit. And Remus pulled back, why? His eyebrows came together, not getting the losing of a kiss. And oh, Sirius rolled his eyes, as his hands ran down Remus's arms. "You're supposed to say hello."