In dating circles, it's well understood that social dominance—owning a room, leading others, demolishing tests—is a key female attraction trigger. Many women openly state, "I want a man who won't put up with my shit." Social dominance is also the most accessible trigger for young and less intelligent men to leverage. It's straightforward: command the space, set the frame, and watch interest spike. Women respond to men who demonstrate leadership and refuse to be pushed around by social pressure

It's also understood, though more taboo to mention, that a man's capacity for physical violence influences a significant portion of female attraction. This partially explains why football, rugby, and hockey players occupy higher positions in the sexual hierarchy. Physical capability signals protection, strength, and the ability to handle threats. Women's attraction systems are wired, in part, to recognize and respond to that capability, whether consciously acknowledged or not.

In the film, Lorraine tells Marty that George is cute, but she wants "a man who can stand up for himself and protect the woman he loves." George spends the film as a neurotic, passive geek. Then, in one moment, he knocks out the school bully Biff. That single display of courage and violence ignites Lorraine's attraction instantly. She doesn't fall for him out of sympathy—she falls for the alpha version who demonstrated strength.

George's knockout of Biff transforms him. He becomes confident, well-styled, and successful—no longer a white-collar peon trapped in suburbia. Lorraine responds immediately to his alpha moment, and he responds by becoming the man she's attracted to. One display of physical dominance and willingness to fight catalyzes his entire transformation. That's the power of standing up and refusing to be pushed around.