I'm against Spock too, but reversed stupidity is not intelligence. It seems unlikely that your level of humour is exactly what you want. People try to strengthen or weaken their own emotions all the time, by becoming more confident, less anxious, less depressed, more motivated. The grandparent is evidence that you can do such self-modification easily through punishment or reinforcement.
Isn't humour it's own reward? What extra reinforcement system could you use to increase it?
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.