He is obviously a smeg head. Tell him to wash it at least daily and if it is really bad, 3 or 4 times a day. It will go away with age. The glans are secreating large amounts of the oil that prevents the foreskin from sticking to the head. If he is uncircumsized, this builds up to a cheesie looking consistency and needs to be cleaned.
If he is older, he should be especially attentive to cleaning it because STD's love the "cheese" and it gives them a good breading ground after unprotected sex.
See, now, this makes no sense whatsoever. If you're so keen on perpetuating the "master race", then why should the "masters" be wasting their seed on acts of fellatio and manual stimulation? No, every Aryan sperm is special! Best not to waste a single drop. (Of course, MY recommendation is to turn all of you into castrati who do goodwill tours around the world performing Wagnerian operas.)
It was refferred to as "cheesie looking" which it is and "cheese" thus sugesting it is a "pet" name comonly used here in the UK. ie, "His dick had a cheesie foreskin". It does get called smeg as well and a common UK insult is to call some one a "smeg head".
If he is older, he should be especially attentive to cleaning it because STD's love the "cheese" and it gives them a good breading ground after unprotected sex.