Girls and guys what do you think about the 3 day rule?

that's sh*T... you know, in 3 days, there are so many things that would happen. A guy or a girl can meet new people in 3 days. People might also forget things because of either work, school, met new people, stress, depression, and so many many sh*ts that happen with their life. Let's switch shoes, if I give you my number and you call me back the next day asking me how am I doing? do you look like desperate? no!!!! you are just trying to be friendly... right? what's wrong with that? nothing........