Bearable happiness

There are some kinds of happiness I can deal with, and others I can't. My own happiness is easy to comprehend. The happiness of others is another case. This isn't against people being happy; I'm all for the joyous. This is about the kind of happy state that leaves me completely clueless, and I wonder what the hell's going on. I'll sketch out the meaning for you. When a happiness can't be related to, or there is a fundamental disconnect between the reason for joy and the response, it's confusing.