I had to force myself to laugh , and there were about 3 - 4 Brown Bag fouls . Everyone 's minds were in the gutter . It was ridiculous .

Generate a question about the above context.
Why did they force themselves to laugh ?
OPT:
+ They are not able to laugh at jokes unless forced to laugh .
+ They wanted to people to see them as a normal human being .
+ They wanted to fit in with the other people having fun .
+ They knew if they did nt laugh people wo nt worry about them .