[spuz]

Someone who is sexually harassing another employee is not exactly in what I would call an ordinary romantic relationship. Who in their right mind is going to go to HR and say hey you know me and that employee over there well he's giving me sexual favours in return for his position at this company.

A person no matter what level he is at who has a genuine consensual relationship with another employee should not cause the company any issues which HR would need to resolve so I still don't understand the need to declare all such relationships to them.

For what it's worth, in the UK it's perfectly OK to have a secret office romance and such things are not required to be declared. It could be that our cultural differences are the main reason for this difference in opinion.