Never ever. I'm having fun writing the nasty bits, they are not there to appeal to more players or something. For the record, I also love the Seduction flows as well and they too are not added for appealing to broader audiences etc. I enjoy writing them and I love giving the players the option to choose how to play the game without punishing them for "wrong" choices. You want to be an asshole? Be an asshole. You want to play a more gallant fellow? Go ahead. Want to zig zag the line between? Be my guest.
The only moral limitations are story based, i.e. sometimes it makes no sense for Karder to rape the girl whose cooperation is vital for the success of the mission or seduce the one who tried to murder him.
