There's an awful lot of speculation about what happens when you die. If you're religious, your beliefs might impact what you think about what happens after death. If you're not, that, too, might influence things. You know that, over time, your tissue dies, that if you're going to donate any organs, the medical team will have to act quickly in order to make it work. You also know that, eventually, your body will decompose, but that takes a little bit of time to happen completely. There are some things you never knew happen to your body right after you die, however, as well as those more well-known processes that take longer to kick in.
For what it's worth, some of the things that happen to your body relatively soon after you die aren't entirely comforting or pleasant, but then again, you probably didn't think they would be, now did you? Death is a little bit of a scary topic for a lot of people, so perhaps it's no surprise that some of what happens to your body is a bit unsavory. From what happens to your wrinkles to what happens to the contents of your bladder after you die, there's still a lot going on, even if you don't realize it.