The smirk on his face at the end… the satisfaction of pleasuring and man w ur mouth and the best reward is a mouthful of his man cum! Fucking luv that!
I did this once to a co worker. We had this sexual tension going all day working on jobs together, and I invited him over after work for a beer, I just went for it at one point and unzipped him and sucked him off. It was almost like we both knew what was going to happen. We became good friends then afterwards.