I used to give "talks" that were boring. I knew they were boring, nearly all talks of that nature were boring. Folks struggled to pay attention.
We had one dude come in from another company give a talk about their product, whatever it was, and he "spiced it up" with photos of scantily clad women, with comments about them. The thing is, we were a very straight laced outfit, and had female coworkers in the audience. One of them made a stink about it. I never knew ths whole story, but it went on for some time, and the VP of that other company finally wrote a letter of apology to us that was shared widely, I suppose as an attempt to make it go away, which it did. But it still made the lunch time convo for some time.