Knife play was something I discovered by accident. My fuck buddy was rough, and hate fucked me all the time, by digging his fingers into me and leaving bruises or by choking me while he was grinding his dick in my cunt. Then one night he was deep in my cunt and told me he wanted to fuck my ass, I said no.
Since I was sore from the night before and he grabbed the knife next to the table and put it to my neck. My pussy reacted to him overpowering me and he felt it squeeze his big cock. He pulled his dick out my wet cunt and pushed the knife into my skin as he rubbed his big dick on my asshole. When he pushed it deep in my ass the knife went into my neck more and I felt it cut me. He fucked my ass hard as the knife slowly cut me. I could feel the cut on my neck as I felt him about to cum, I rubbed on my clit, and it happened I came all over my fingers. He filled my ass up after that he would surprise me, and we would knife play and fuck.