Making A Guy Cum

I was at a party dressed up in my school girl uniform and a guy started talking to me and instead of chatting me up he just said you are a slut come and suck my dick I said but you have a girlfriend he said so what just do it you slut so we went outside in the alley and I didn't like his attitude s when he took his dick out I just put it on my hand and I said do you want me to wank it he was saying just do it so I said are you going to cum hard his dick was moving so much he said hurry up but I still kept teasing him saying are you a naughty boy then I stroked his dick and his dick was moving he said please or im going to cum so I slowly stroked it then stopped and he said oh no then he started cumming in my hand I made him cum too early he said look what you have made me do now then I wiped his cum on him and walked off.