Tops like this, whose voices are slightly menacing, drive me wild. The way he says 'come on...come on' is both encouraging and threatening, like saying 'put my cock back in your mouth or I'll do it for you'. And then, once it's in, he switches technique to praise: 'that's a good fucking boy'. Cocksuckers are subservient by nature, and nothing makes us want to suck cock harder and better than to be called a good boy while we're doing it.