Like the person above says, many women love sex, it's just that over centuries they've been told that it's wrong to enjoy having lots of sex, often by the devoutly religious.
As a woman myself, I do think women - often but not always - need an genuine attraction with someone to have sex with them, even if it's just a physical attraction and find being with a total stranger less appealing. ( I should restate that that's many women but not all, by any means. )
Women ARE wired that way. They've just been forced by a patriarchal cultural to hide it.
Women lose nothing by being inseminated by more than one man.
their instincts tell them to mate with a male that not only provides good genetic stock but that will hang around afterward also, there's a reason in olden times they were called 'hunter gatherers' and 'providers'