Answer: False
Explanation: When speaking publicly in front of an audience, it is normal to have a certain level of anxiety. However, if that anxiety is so visible or interfering with speech, then work must be done to overcome it. If the audience sees that we are nervous while speaking publicly, they will think that we are insecure because we do not believe what we are saying, so we persuade the audience into something that we do not believe ourselves. When it comes to overcoming anxiety, it has to be said that it cannot be completely abolished, but overcoming it means managing, channelling our anxiety. One way to reduce or properly channel anxiety is to stop thinking of our speech as something rigid that will bother the audience, but as a larger conversation or as some of our advice, knowledge, experience that we want to share with the audience.
Imagining your audience in their underwear and thus trying to overcome anxiety is likely to cause a grotesque grimace on the speaker's face, or simply give a impression of the speaker being lighthearted and not serious enough, which will certainly not cause a favourable effect on the audience or a favourable outcome of the speech.