I know people will gain weight to try to hide their body's actual features, but if you're female I would think the first thing you'd want to do is lose weight. Boobs are there to store fat. The less you have, the easier to hide them. And if you put on just a little muscle, in this world people will automatically relate you to being more masculine. And as for guys who hope to transition to women, more fat would mean more to shape into boobs, hips, etc, but really anything over 15 extra pounds would be ridiculous and heading toward disgusting.