Never shit where you sleep. That has been and always be my philosophy on romantic relationships in the workplace, whether it be peer to peer or manager to subordinate. It's just a bad idea and the potentional for a hostile and horrific working environment when the relationship goes to shit is too great. I would also find that working with my partner takes away from my individuality, separatation from one another (to a degree) is healthy, no one needs to spend 24/7 with their partner. It would be way to claustrophobic for me.