If you want to stare at someone unashamedly, look directly pass them and wait for them to try and meet your eyes. When they fail to do that the look around (usually nervous for a second) and won't look at you again for some time. This is your chance to straight up stare at that person for atleast 45 seconds.
People are extraordinarily aware of their sense of touch. If someone accidentally rests their knee on yours
They may act like they didn't realise it but they definitely know that it's there.
You can judge the character of a person by how they treat another person who can do nothing for them . For example how they treat waiters in a restaurant can speak a lot about their character.