It’s relevant to say my friend is a sex worker because the OP was implying that vanilla people can never understand sex workers. So it’s relevant, because me being best friends with a sex worker while being vanilla directly contradicts the OP’s arguments in the article. If you can’t see it, then that’s a problem. Seems like you’re trying to use faux wokeness to try and undermine the more worrying implication that the OP didn’t get proper consent from her vanilla friend and that could be why he felt dirty afterwards, rather than because “vanilla people can never understand sex workers" and that he “shamed her for her sexuality".