Unexpected dogging.

I have been to a few cruise sites recently and had light fun. But this time I was walking home and came across two guys having fun. Without being rude they weren't really my type but I found myself getting turned on just watching.
The older of the two was bent over sucking his cock with his trousers just slightly down showing his arse. At first they stopped when they saw me but then moved closer.
The older of the two bent over and held on to the wall. I then watched as the other guy slowly started to slide in his hole bare. They started fucking and the top was calling me over.
I found myself wanting to instruct him and ordered the top to fuck him harder. The top obliged but I felt he was holding back. I got closer and whispered in his ear that I wanted him to breed the other guy and show me just how hard he could fuck.
I was not disappointed. The noise as his cock slammed into the old guy was so hot. And the noise the bottom made was incredible. I have wanked multiple times since then just at those noises.
I still felt the top could go harder and kept instructing him to do so. I asked what could encourage him to fuck him even harder and he said for me to cum on his cock.
I started to wank hard but told him he needed to breed him harder than ever. The bottom even though we were close to people walking by was making so much noise. Another guy actually left because it was to loud for him!
I found those noises drove me wild and I shot a massive thick load of cum over his arse and the tops cock.
With that the top found a new level and I have never seen such a hard finish. He let out a loud moan and then filled the bottom with his seed.
Now I want to watch again