Most people might think I will say something like "funerals". But I think funerals are a fine time to laugh.
I think a bad time to laugh would be at a gynecologist's office during an exam.
Could you imagine letting out a giggle? If you had a guy raper gynecologist, this would mean you came onto him. And he'd be all over you in a heartbeat.
If it were a woman, I think she might hope the metal was too cold or something.
Regardless, if you laugh during a pectal exam, then you ARE MOST DEFINITELY A FREAK AND NEED TO SEEK COUNSELING.