The thing is, S and BB are friendly, but they definitely don't have any relationship outside of work, and they don't work together, so - this is pretty much like you telling the full-time workers. Ideally, ones you only see once a month or so.

tl;dr imo you need more options for that one question!

But then we wouldn't have the lovely statistic that 25% of respondents would definitely tell their colleagues about unfortunate peeing experiences, and that is something I am glad to know!