William is incredibly confident sexually, and had no problems at all agreeing to let Brayden blow him. He confesses that he totally loves BJs and loves having a talented mouth get him off (and it would indeed have to be a talented mouth to handle that big dick of his!). I'm also inclined to think William is quite the exhibitionist - just see how he moves in front of the camera and sneaks in some flexing whenever he can. The prospect of getting that cock worked over for an audience was too much for him to turn down, and Brayden gets to do just that!