When you peform oral sex on your man, make sure he's clean and washed. As you put your mouth over his penis, do so slowly and at times, grip the shaft with your entire mouth but no biting...just grip. Try tr arm without sinking your teeth in. That's the way to go. As you slide his shaft in, you can stop, pause and suck him a bit. A times, lick his balls too, tease it and watch his enjoy it. Do not gag yourself trying to suck and swallow his shaft at the same time without movement control. If you can feel him throbbing, then you slow down or stop. Start licking his shaft and when he groans and push your head towards his penis again, you do it all over again.
When you want him to shoot depends on your speed and his reaction. If you want him to come inside your mouth, then don't let go when he starts throbbing. Try to coordinate your mouth movement as he comes. Whatever you do, don't get carried away and 'bite' into his member. Just see how he feels when he comes into you filling you up with his precious 'protein' load. Enjoy.....ooooh lala.....