Sure, there's a policy, but who cares? People need to quit meddling in the affairs of others. If a relationship is consensual what's the issue? If we're spending a significant part of our waking hours at work, it should be a baked in assumption that at some point, some coworkers are going to end up in a romantic relationship together. Hell, the majority of my significant romantic relationships started out as consensu…
Even though what happened between Alice and Bob was consensual, it made it impossible for Bob to do his job. Alice and Bob were both fired.
You can’t effectively distinguish between a “good relationship” and a “bad relationship” so a blanket rule makes the most sense. The issue is not necessarily about whether the relationship itself is ethical, but how it appears to observers and if it affects the organization.