So, I know he's an alien. Now what do I do?

I wish it kind of opened up to some new dialogue options. In one of my saves, my sim has recently also discovered several disguised aliens among her friends so I tried the option to “tell a joke about aliens” on one of them, but nothing out of the ordinary happened. Do they sometimes get a tense reaction from that kind of joke, or does the subject matter not really have any kind of effect?

Also it would be nice if we could ask whether or not someone was an alien like with the mersims or to reveal their true selves once we’ve discovered that they are in fact aliens :)