1. The executive has admitted fault.
2. The fault included:
a)Mentioning his relationship status ("poly") to a candidate during the interview;
b)Asking for a sexual favor off-site while the candidate was still waiting for response
Neither it in and of itself an offense. The critical part is that he has done so from a position of power, specifically - as the interviewer, during the employment process.That's as black-and-white discrimination as I can see.
Sources:
[1]https://slate.com/technology/2018/10/google-x-sexual-harassm...
[2]https://www.nytimes.com/2018/10/25/technology/google-sexual-...