You can. But it will be veryyyyyyyyyyyyyyyyyyyy booooooooooooooring….
For a soldier, peace gives happiness. For a king, luxury gives happiness. For a begger, bread is happiness.But if a begger gets bread all day everyday, it wont be making him happy anymore.
Take yourself as an example. If your country is going through war, nothing can make you happier than the bloody war coming to an end. I assume your country is not at war right now, but do you feel happy?
Such is life. Happiness is relative.When its hot, a cold breeze brings happiness. When its cold, warmth brings happiness.
So if you are always happy, you might not be happy about it anymore. Its not rigged in the emotion, but in our psychology.!