Well, to be entirely honest and no offense intended, but this game is pretty much from the ground up built around the assumption that the Champion -- and, thus, you the player -- is a polygamist. Just as how the game doesn't shy away from homosexual content any more than heterosexual. In fact, most NPC's in CoC tend to be at least obviously open to either type of relationship and have no declared gender preference, which starts making sense when you really think about it. If too many characters -- including the player character, for that matter -- were ever that rigid sexually, it would risk making much of the game largely unused or inaccessible, especially considering the scope and the amount of content unique to some characters. The trick, if you will, is to allow either and let the player decide, within reason (wins versus losses and bad-ends) with each encounter what they want to see rather than the game assuming that for you. Granted, it doesn't really require you to be open to multiple simultaneous relationships with more than one other character or whether you're in to guys or girls more or fine with both, but for a game like CoC it's better to permit any routes freely without restricting one for sake of the other. Unfortunately, that does admittedly make some play-styles and selective preferences more difficult to adhere to than others, like being a monogamist in a game where such a word might as well be considered more fictional than the existence of magic and other fantasy elements, or a female cat that walks and talks like a human with a dog cock and a fragile sense of self-esteem.
Try not to let the idea of scrapping a character bother you that much. Trust me, part of the fun of CoC is sometimes starting over from level one and building a new character up from scratch, taking what you've learned from previous play-throughs and trying something new this time.