i not saying that a woman or a man only sees one person as their potential in their whole lives, i'm saying here that generally when a woman loves someone really really much they're seeing him as the world for them, making it so they're only seeing only that man (or any other gender idk) as their only partner for a unknow period of time and of course life and it's variable happens (i think i phrased it wrong the first time or didn't really deepened what i meant i'm not sure).
As for the mens in most cases that i know and from what i experienced i think that mens are way more enclined as having multiple love interest, what i mean by that is that they can be in love with more than one girl, may the love be deep or not, that's why some mens have "side-chicks" even when they're really in love with someone (not saying that the concept of side-chicks is ethical or anything), that's why the harem genre is popular with young mens (and even regular dudes), whereas the harem genre for girls is more romance like and it's way less than an all you can eat buffet but more what should i eat and what traits i want to find in a man, should he be cute, manly, pushy, angry, more like a controlled chaos type of men (those who are dangerous and unpredictable, that doesn't follow the rules and that brings lust for the uncommon and trill from the everyday life and that has a dark but subtle hearts etc etc etc etc, like pirates, vampires, werewolves, lone bandits, rich mens in all forms that are possesive, alpha, tall, dark and that brings change, the manly side is in option). i'm not talking about how modern society sees it (not how other societies sees it like mormons, north and south africans coutries that has polygamous people etc)