Men will only use women for sex when they're young. And it's only with ugly fucking losers too, not hot, tall, and rich guys like some people think. When you reach a certain weight/age, men no longer want to even touch you, as worthless as that is.
Also, I'd argue that women are almost never used for just sex. They're also used for loyalty, support, compassion, care, dedication, and love (all traits that only women possess/are capable of). Notice how women in FWBs/fuckbuddy/situationships only dedicate themselves to one man, while the ugly broke loser seeks other women constantly.
Even when a fucking broke loser is worth nothing, he still thinks he can do better than an ugly and/or fat woman. Why would he settle for an ugly woman when he already feels like he possesses that highly attractive woman he bought the sexual services of (either in real life or virtually). Their cocks are broken from chronic masturbation, porn, drugs, low testosterone, and delusional narcissism.
And he'll be angry about spending money on you if he already can buy a prostitute or porn star online. Stingy losers don't want to pay for shit or buy women anything if she isn't hot enough.
Sex itself is focused only on the male orgasm, with no clitoral stimulation. Men have this entire world catered to them and their sexual needs. That's why prostitution and porn (rape and human trafficking) exists. By men, for men, to the benefit of men. Yet they still think it's hard for them to get sex. No, it's harder for women to get sex because only sex that results in an orgasm counts. Orgasmless sex is not sex, no matter what anyone says. The majority of women have never orgasmed through sex in their entire lives.
All I'm saying, is that it gets worse. As insulting as it is for that vile, disgusting, unwashed, lowlife loser to wave his tiny, smegma encrusted, limp dick with a low sperm count in your face, begging you for a blowjob with no reciprocation, there will be a point where even HE would rather masturbate to porn or buy prostitutes.