Go into Romance, click on Het Couples. It lists various pairings, and how many there are for them. X-rated has number of people involved, two players, three players, four or more. Those are the kind of tags that are useful.
It has a few for the common pairings, and lists other females to cover anything else with that guy, and it has an other pairing tag as well. I would personally want anti-tags, but you don't need to put them in.
*kills Kiba, Sasuke and Neji*
No pussy for you!