Men are more in demand for casual sex than women, for natural reasons.
- Casual sex is more risk-free for men than women. Even though there are greater options for contraception these days, women are biologically wired not to seek it out in the same way.
- Women produce hormones during sex which causes them to attach. Men produce hormones which increase their adrenaline and attachment short term, but not long term. As a general rule, women get more keen after sex, men less.
- It takes more to give a woman an orgasm than a man. The chances of a stranger who doesn't know a woman's body or preferences being able to get her off, are small.
- Men are biologically wired to seek variation to a great extent than women.
Of course there are exceptions and variations of this. Women also seek validation through sex, men seek satisfaction through "hunting", not just orgasm. If your feelings are with one person, you can have no-strings sex with another without attaching.
The ball is not in anybody's "court". There are advantages and disadvantages to both the man and women's situation.
I completely understand and agree with the notion that women want sexual pleasure just as much as men, and I am aware that “giving it up” on the first date is not always giving it up so much as it is “getting it.” If that is your goal, then of course this is a different matter altogether and you are free to do that. But understand that it will not make a woman desirable to men. Men can do it and maintain (or sometimes increase) their attractiveness; women cannot. I acknowledge that this is holding women and men to a different standard, but in this case it is appropriate, because men and women are different in this respect.
Men are built to be sexually promiscuous – or at least, they are built so that we can be sexually promiscuous. There is little risk for a man when it comes to sex: he doesn’t need to worry about pregnancy. Even if he is not using a condom, he can control when (and if not when, where) he ejaculates. As a last resort, he is able to walk away from the woman and leave her to deal with the pregnancy. This is a repulsive thing to do and no one denies this – probably not even the men who do it. But it can be done and it is done. Sexually transmitted diseases and infections have a significantly higher male-to-female transmission rate than they do from females to males, and the effects are worse for women than they are for men. There is also the factor of physical strength: if a woman goes to bed with a man she thinks she likes, she is far less able to then change her mind, for fear of rape. A man, on the other hand, has no such problems: sex for him is very low-risk. The result of this fact is that, historically, men have taken the offense in all matters sexual; they are the pursuers. Because they are more sexually liberated by nature, they seek sexual relationships more frequently, and historically the active role in relationships has fallen on their shoulders, while women have assumed the passive role. This is the case elsewhere in nature as well, for the same reasons.
It is only because Western culture in recent history has emphasized the equality of the sexes that some women see this dynamic in a negative light, and get upset about a double standard. The notion that a man should protect his wife and children, or that he should not abandon a woman he impregnates, or even that he should leave the toilet seat down when females are in the house; these notions are all rooted just as deeply in sexual differences, but because they don't place a burden on females, no objections are raised. There are balances to this phenomenon: women have far more opportunities to have sex than men, and thereby are able to have sex with higher quality partners. You won’t find many girls that have had sexual partners uglier than themselves, but you’ll find an endless list of guys that have – in fact, there is a contingent of men that usually only have sex with girls less attractive than themselves. This is a product of the same phenomenon: because men can have low-risk sex, women are far more in-demand for sexual relationships, and therefore have more and better options. Men may be able to get laid more often, or at least, with more partners; but women often get to sleep with men that are out of their league. It is a matter of quality versus quantity, and I think there is a lot to be said for both, to the point that I am not convinced that either one is an advantage – they are just corollaries of the same phenomenon.
A woman is judged negatively for having promiscuous sex because it takes no skill or effort on her part; all that is required is her assent. There will never be a deficit of sexually willing and attractive men from which she can select if she chooses. A man, on the other hand, has to be highly gifted or skilled in order to get women of his own caliber into bed. This is because the women willing to do so are few(er) and far(ther) between. (Consider for a moment that no one respects a man who always sleeps with women that are way below his standards – everyone considers this repulsive.)
Most women prefer sex in relationships rather than casual sex. You'll see that even women who have spent their 20s sleeping around seek out something else as they get older. You also see the large number of girls seeking advice on a f-buddy or FWB gone wrong. In rare circumstances a woman may have regular, good sex with a man without emotionally attach - usually this is a result of either the fact that she has gone beneath her league, that she still has feelings for someone else or that she is simply seeking easy validation.
Even women who aren't into casual sex themselves, are usually pro having the option and are often fronting it for the sake of women's rights (or whatever term feminists prefer this month). Which is why you'll see women on online forums promoting casual sex as a "right" even if they don't practice it themselves.