Yes, they have. I am NOT one of them. I don't have one of those guides. But I've received enough mandatory training to have a layperson's understanding of the baseline in my national jurisdiction which is USA. The baseline is twofold, it is fairly clear, and it is worth reviewing. Don't take my word for it, but I think if you check your authorities you may get confirmation.
First, no "quid pro quo." That is, you should steer clear of even the appearance that you will provide business advantage in exchange for affectionate acts from a person who is sexually attractive to you. This principle is an excellent reason not to ask an interviewee to go out on a date (slightly simplifying an example from elsewhere in recent Hacker News).
Second, no "hostile environment." That is, you should steer clear of even the appearance that you are making the workplace uncomfortable for people who are sexually attractive to you. Decorating your desk with a calendar featuring glamour photos of models, unless that is your duty in your occupation, is not a very good idea.