'"Don't do anything that standard workplace conventions would forbid" might cover things like drinking alcohol,
The thing is: sex is different from a lot of other potentially offending things in our society.'
Which confirm brilliantly that this whole discussion is about anglo-saxons (and particularly the US-WASP kind) generalizing their cultural and religious taboo to the rest of the world.... and rather than seek professional help to resolve their issues demand that the whole world become as neurotic as they are.
It's the story of the agoraphobic that demand that no game be played in open-air stadium because that makes him uncomfortable, and of course the his claustrophobic neighbour disagree strongly.
"it seems clear to me that we need to engage in some positive discrimination"
that is another example of an US-centric oxymoron.
discrimination is never 'positive', discrimination - in the context- is the selection of people based on irrelevant criteria, that cannot be 'positive', it can only be 'positive' from the point of view of the one benefiting of the discrimination, and there is always someone that is, on the other hand if it is 'positive' to someone, by definition if is 'negative' to someone else.