TL;DR - article just says they talked to riders in Cruise, who said they had (no evidence provided beyond that).
Sex or similar activities aren't explicitly banned in Cruise or Waymo's rules.
Not really sure the article is worth reading beyond that
This is so fascinating! Thank you for sharing
I came across this for those who are interested in reading more:
https://www.khanacademy.org/humanities/becoming-modern/romanticism/romanticism-in-france/a/gericault-portraits-of-the-insane