laughing when I shouldn't be laughing

yes, I have a messed up sense of humor.thank God. I laugh at the most inappropriate things. I can sit and think of funny things and start laughing. and I have been known to laugh so hard that, well, you get the idea. I laughed all the way through my cousins wedding. I was a bridesmaid and when the greek orthodox priest started singing, I just lost it. then the rest of the bridesmaids started. the best time was when I started laughing at the tower of london torture and punishment exhibit. there was an enlarged engraving of a crowd gathered for an execution and so many people came that the stands collapsed. the picture looked like a cartoon with a dust cloud and everything. I just lost it. the yeoman warder thought I was funny but my very serious friend didn't think it was funny. he was humiliated. I don't know why. we didn't know those people.
I don't laugh at serious things like emergencies. in those situations my profanity filter disappears but I don't laugh. oh and my dramatic delivery increases.
laughter is awesome!I feel sorry for people who don't laugh freely or have a sense of humor. they are missing out on a great part of life.