Maybe...
Doesn't it depend on health, relationship status and even what sort of sex you're talking about?
I think it's true younger men, on average, want sex more than younger women. There's plenty of research that men's sex drive peaks in the late teens / early 20s whereas women's doesn't peak until their 30s, and in the earlier years men are definitely more insistent.
I think it's true that men are more willing to have sex outside a relationship. There is research saying that men are more likely than women to cheat because they want sex. And also the obvious one - prostitution is overwhelmingly women selling sex to men. Women rarely need to buy sex from men. But it doesn't follow that women don't want sex outside a relationship, only that they're less likely to seek it. That might be for all sorts of reasons.
Here's another one. Here's an American survey. Men masturbate much, much more than women. fivethirtyeight.com/features/dear-mona-i-masturbate-more-than-once-a-day-am-i-normal/. It is a slightly old survey, but it says that a full 36% of 18-24 yo women don't masturbate. For women in the 30s that figure rises despite that being a woman's sexual peak. On the one hand (or should that be 'off the one wrist') it suggests that men just like wanking more than women. On the other hand, it suggests a stronger underlying sexual desire at all stages of life. While it's true that, historically, women's sexuality has been shamed, that's also been true for men's sexuality too, especially re masturbation, if not to the same extent.
Next: Mumsnet. Off the sex board, particularly on AIBU, there are a lot of ick responses to anything to do with sex. It's true that more women on MN are complaining about their partners' lack of sex drives but that just reflects MN's demographics.
Finally, a controversial point and it relates to the orgasm gap. Heterosexual men have more of them during sex than heterosexual women, and gay men have more orgasms than gay women. It's easier to orgasm when you actually want sex and men don't generally talk about someone else 'giving' them an orgasm - they just have them.