Honking in Costa Rica

During our time walking around town here in Costa Rica, we have noticed a few of the reasons to honk your motorcycle/car horn here: 

1. the stop light turns green and the cars in front of you aren't moving yet
2. driving past a pretty girl
3. a taxi driver sees you walking (or sitting at a bus stop) and honks to see if you want a taxi
4. drivers that know each other honk as they pass  (especially bus drivers and taxi drivers)
5. a courteous driver will honk while stopping to let another vehicle turn or pass in front
6. a driver giving thanks to a courteous driver who just let them pass in front
7. a vehicle gets in the way of your vehicle or pulls in front of you suddenly
8. a vehicle in front of you is going to slow
9. a vehicle in front of you is driving badly
10. a vehicle in front of you turns suddenly without signalling
11. you are about to drive through an intersection, so you honk to let others know you are there
12. you are passing the vehicle in front of you and want them to notice you are passing 
13. a motorcycle delivery person honks to find the correct house on the street
14. a taxi driver who has been called to pick someone up starts honking to find the correct house
15. Costa Rica wins a soccer game