I'll never forget the first time that I heard that pretty mouth say that dirty word. He was in the common room with me, I had him on my lap and he was studying, while I studied him. Then I saw his eyes get wide.
"Fuck!" He said and jumped off my lap and ran up the stairs. I sat there stunned, he never swore before, what had happened?
I followed him. He was on the ground his trunk in front of him and he was searching desperately through it.
"Remus what are you doing?" I ask looking down at him.
"Sorry Sirius but I forgot it was my mothers birthday. I'm going to be in so much trouble!" He grabbed his hair and pulled on it. "Do you have a quill?"
"Yeah." I say relieved. I was worried for a moment that something was very wrong. I went to my trunk and got a quill, and returned to Remus. He was now sitting on my bed with some paper.
"Here." I hold out the quill.
"Thanks." He reaches for it and I take his hand and pull him towards me and into a kiss. He smiled into the kiss.
"What was that for?" He asks. I smiled.
"You said a dirty word." I say now smirking.
He leaves his mouth a little open, then closes it.
"Prove it." He laughs.