Marriage. Some need to remember what it is all about. You don't give up when times get tough. When you choose to marry someone you are choosing to spend the rest of your life with them through the good and the bad, the easy and the hard times. You stand by that choice, and that person, no matter how hard it is, every single day.
This one is TRUE! I can't attest to the 20% fact, but when we're laughing, cells that destroy tumors and viruses increase, as do disease-fighting proteins, T-cells (which are a major part of the immune response), and B-cells (which make disease-destroying antibodies).