The 4 rules I was taught 1. Kneel. Being on your knees show’s submission and obedience. 2. Hand use is to be kept to a minimum. It’s a blowjob, not a tug job. 3. Swallow most of that nut, but leave some on your face. It lets all the other boys and girls know you belong to him. 4. Upon his climax thank him for the cum load. It’s just good manners.
It's so much more enjoyable when you have a big hard cock to suck tho. I like a thick throbbing cock gagging my throat. If it's not big enough to gag me...