I can trade or buy back the old knife without the new knife getting insane on me. The knife will never accuse me of untoward behavior wih another knife, in fact, I can use readily take two or more knives with me everywhere in intimate embrace without problems, and can even put them to their best intended use simultaneously without hesitation or complaint on their part.
The knife will never nag me to clean or take out the garbage, letting me do so according to a master plan so grand it is revealed to me only in minute stages. The knife only requires basic maintenance at most and never asks me to remove nail polish or complains about an insufficient number of packages from Tiffany's. The knives I am resting comfortably and carressing intimately on the sofa with do not care if the plot of my television show is nothing other than women in swimsuits running around with machine guns and they do not get jealous o another knife on TV or in a movie, proclaimig the steel to be artificially enhanced.
Obviously I would therefore pick woman, isn't that right Honey?