This doesn't really look like the type of game that'd have such an option, but I'm asking just in case. Any plans to have the option to play as a female character in the future? Maybe a Futanari, so you don't have to alter the sex interactions too much.
It's just a matter of personal preference, I feel less uncomfortable with the whole slavery thing if both parties are female. Don't ask me why, I just do. I know it's a long shot though, I understand if that's not what you want this game to be.