Focus only on foreskin, blowjob and deepthroat. Perform deepthroat and foreskin play mostly. Go back and fort between the two. And most important for me when the dick is about to cum focus only on forsekin play during the cum blow balloon with the foreskin while cum and swirl tongue around dick head underneath forskin while cumming and when the cum is over proceed with deepthroat but dont swallow any cum, the cum must all run off while perform deepthroat your lips will push all the cum to the base of the dick. Notes: Tongue underneath the foreskin while flaccid and erect. Biting his foreskin/pulling on it with your lips while flaccid and erect. Put your fingers underneath his foreskin. Blowing air into his foreskin like a balloon and continuously doing all these things.