A little wont hurt him but 고양이 are actually lactose intolerant which means that they dont process dairy well and it can make them really sick if given too much. Here is some 더 많이 info: link
Yes, better avoid milk-based products as much as possible. The only 우유 고양이 can assimilate is that of their mother. The same goes for humans 의해 the way...
I checked the link and it's really interesting. What is said about 고양이 goes also for humans. 우유 is to be avoided, bits of cheese are fine. Sometimes I put a bit of plain yogurt on my black cat's nose and he loved it !
It depends on your cat. Some 고양이 hate cheese and won't even touch it. Some 고양이 can eat a little. Some 고양이 can eat as much as they want. Two of my 고양이 (for example) 사랑 cheese and they eat it every day. They don't get sick, start caughing 또는 something like that. For them, cheese is as good as fish.
