You're welcome!Dear teachers,
1. Those guys have a good sense of humor. Yes, if they're a distinct group with a shared sense of humor.
2. Those guys have good sense of humor. No.
3. Those guys have good senses of humor. Yes, if they're individuals, each with his own distinct sense of humor.
When you are referring to multiple number of people, which of the above is/are considered to be correct.
1 and 3 are good. If it's a group of people who share a similar sense of humor, 1 makes a little more sense. If not, 3 does. But that's hair-splitting: either is really fine.
Student or Learner