Romance is a convenient distraction with very few downsides. Even though some of the Demon Masters find it "distasteful", it allows for demons to vent large amount of energies in pursuits and flair that would otherwise have to be dealt with. There is of course no need to worry about Demon "babies" from such flings, and decades can be occupied by a few demons that have taken interest in one another.
The only time romance becomes a problem is when it gets between a demon and a Master. In such cases immediate and harsh punishment must be doled out. This is also convenient, because strong emotional ties can be plucked easily.
If you find yourself becoming interested in another demon, simply make sure that it does not interfere with your owed favors and engage in mutually enthusiastic courtship.
Do NOT attempt any romantic endeavors with the Masters. Yes, they are incredibly alluring. You WILL be punished.
-Demonic guide to Demonic Etiquette, revised edition