[coldtea]

>They aren't fun

That's subjective.

>don't have anything to do with technical content

Most public presentations / speeches contain a few jokes. They don't have much to do with the technical content either, but they help people pay attention and ease in the speech.

It's not like we don't have enough boring powerpoint presentations already. It's also not like those going into the trouble of compiling the slides and sharing their knowledge owe us anything...

[pjmlp]

If I want to get a laugh I go to stand up comedy show, theater, cinema,... not to a developers conference.

[coldtea]

Well, others don't compartmentalize things so tightly.

Most would welcome one or more jokes in a developer speech. So much so, that it's common advice for any kind of public speaking and presentation to add a few jokes to lighten the mood (you can find thousands of articles, books, and public speaking training sessions advising about this).

Some of the best technical speakers add humor in their presentations (often lots of it, e.g. Raymond Hettinger).