How to answer a joke

This requires temporary preparation. You can repay it with the same joke. For example, how about being my girlfriend? You can say: OK, but you have to support me, and then say some impossible conditions, such as picking stars or taking you on a trip to Mars. Deal with a man as he deals with you.

You can also pretend not to hear, and change the subject, such as what a beautiful day it is today! How bright the sun is. Actually, tonight is very important. ...