He has a point, though. For me, the most fun of the game is that MC can literally boink every woman in town. As it is now, he still can do that, but not at the same time (except for those women who are unboinkable, according to DC). I don't care about realism here, just saying that it would be so much more fun for some (including myself).
Take Dragon Age Origins for example. In that game there are several romancing possibilities, but you have to decide between Morrigan and Leliana at some point, leading to a hard break with the other woman. However, making the right choices at the right time will nevertheless make it possible for you to have a 100% love relation with both at the end. I don't know if this is a glitch or actually intended by the dev team, but it is possible and makes most of the fun because it's also such a challenge.
There seems also to be a possibility to romance three characters at once in that game (two female and one male or the other way round) if you are into that.