A childhood belief about swearing

I remember when I was very young, there was a television show on a saturday night. It was sort of a variety thing, and one segment of the show was called "gotcha!" it played pranks on celebrities like a candid-camera thing.

There was one celebrity who cursed alot and because this was prime time television they would put a "bleep" over the top of the word. I noticed that this was a regular thing and wondered what the "bleeps" where for.

I also noticed that when the crew would jump out near the end of the prank the amound of "bleeps" would rise. It suddenly dawned on me! The bleeps sounded exactly the same as a hospital heart monitors.

And thats why the amount of bleeps when up when the crew jumped out becuase they made him jump and his heart rate rised! stupid...