giving up your seat on the bus to a female who is either a) pretty or b) likely to give you a severe ear-bashing if you don’t;
2. inviting people around to your house and plying them with food and drink in order to demonstrate that a) you have expensive stuff in your house and b) that you can afford to ply people with food and drink;
3. sucking up to people who may be able to do you a favor at some unforeseeable point in the future (elsewhere this is known as bribery).