I got this from some email. It goes something like this:
A lady goes to a funeral for her mother. She meets this guy who she has never seen before in her life. He is not related to anyone at the funeral, but he was there. He likes the same things she likes and they seemed like they could be perfect for each other. She felt this was the man that she needed in her life. Unfortunately, she was not able to get his phone number, his address, none of that, before he left. She then decided to kill her sister. Why would she do that?
If the guy wasn't related to anyone at the funeral, then he must have been the friend of someone there. If she killed her sister, how would we know that the guy would come to that funeral, too? Unless the guy was her sister's boyfriend! Clearly her sister had recently met this guy, or at least the sister hadn't been in town or whatever since they started dating. This would help ensure he would come to the funeral and that her sister would be out of the way so she could date this guy.