Fucked by soft cock stranger

So this day I decided to go for a walk near my local river and came across this guy with his pants down and cock out. He was blocking the way and said he wanted to fuck me. I wasn't that keen, but he was very persistent. He pulled my pants down and tried to enter me. You'd think he would have been aroused by the excitement but the soft-cock couldn't get himself hard enough. He kept trying to stick his floppy dick in me, but couldn't do it. Maybe it was me filming his cock but he finally managed to get it stiff enough once I bent over and let him fuck me from behind - Doggie style. He got his own back when the fucker squirted his load of cum in me.