Grapefruit enzymes reduce the amount of insulin that the body makes which helps the metabolism stay regulated. A well-regulated metabolism helps you to lose weight faster and more effectively. Scientists do acknowledge that grapefruit has properties that balance out blood sugar levels and help the metabolism.
It's possible your Facebook woes are coming from some sort of malware, be it a keylogger, a trojan, or some other type of virus. Even if you think your computer is clean, it can't hurt to check.
Example 1: This quotation comes from Freud's Civilization and its Discontents. Here, Freud implies that man will only be happy when living according to the pleasure principle. The pleasure principle leads people to do or desire things that bring them pleasure.