Perhaps I take my reading too literally, but for many years I've been highly annoyed at sword-and-sorcery or fantasy novels depicting female heroines wielding mighty swords and wearing boobalicious armor, demolishing hordes of opposing warriors without breaking into a sweat or mussing their makeup. For example, this Red Sonja comic cover is reproduced here courtesy of Wikipedia.
Speaking as a combat veteran, I'm here to tell you, muscle mass counts. If the average woman takes on the average man, she'll lose any physical fight because he outmasses her and has greater strength. If she's got extreme skillz, she might hold her own - or she might not. His superior mass and strength will still wear her down if the fight's prolonged. Furthermore, she has to get in close to land a telling blow. If he can pin her at that instant, immobilize a limb or capture the blow as it's launched . . . she's neck-deep in the proverbial doo-doo.
The same applies to the fantasy armor worn by so many of these babes. It's precisely the opposite of what armor should be! Now Tor, publisher of many books in this genre, finally spells it out.
Assuming that you are avoiding the blow of a sword, your armor should be designed so that the blade glances off your body, away from your chest. If your armor is breast-shaped, you are in fact increasing the likelihood that a blade blow will slide inward, toward the center of your chest, the very place you are trying to keep safe.
But that’s not all! Let’s say you even fall onto your boob-conscious armor. The divet separating each breast will dig into your chest, doing you injury. It might even break your breastbone. With a strong enough blow to the chest, it could fracture your sternum entirely, destroying your heart and lungs, instantly killing you. It is literally a death trap—you are wearing armor that acts as a perpetual spear directed at some of your most vulnerable body parts. It’s just not smart.
There's more at the link.
Now, if they can just get their authors, marketers and cover illustrators to listen . . .