Jokes can be great ice breakers in presentations. Jokes can also be incredibly awkward when introduced in the wrong meeting, at the wrong time, with an audience who is not ready for them.
Here is my advice: do not hardwire risky jokes into your slides, but rather, keep the option to tell them verbally. If the mood is right, go for it, if the audience vibe is not right, you can bail out at the very last moment.
Borat bathing suit slides cannot be unseen, even when double clicked really quickly…