What the hell does this even mean? He's 'asking' you to support the offending of a mythical "third person"? I have no idea what you are attempting to communicate.
I'm asking you to think about obscenity and offenses thereof in a completely different way than you're used to.
This means that the use of obscenity is directed at someone or something, intending offense thereto. Yes, he's asking you to support the offending of a third person (or thing), mythical or not. He is acting as an offender (whether there is a being to experience being offended or not), and he's asking you to take the role of offender as well.
Do understand: there are times when initiating offense is appropriate. There are times when asking others to join you in initiating offense is appropriate.
Some people in the audience may not want to share in offending the subject of the offense the speaker is initiating. Thus, by using obscenity, the speaker may alienate some of the audience. Now, question is, was that necessary?