Hmmmm...Tough one Maciamo.
Over all I think I would have to deal with it on a case by case basis, life simply isn't black and white no matter how much we want it to be.

The one exception to this would be if my partner needed something that I couldn't give them. As a bi transexual my life is one big shade of gray, if my partner male or female needed a sexual element I couldn't give them. Then I would have to let them find it else where, its not an easy thing to admit or deal with but when I love some one I want them to be happy. I don't want them to feel chained to me or to keep them from feeling fulfilled.