weird double standard

If man has had multiple sex partners he's alpha, but if woman has she's a slut and used goods, why is this? Why isn't woman who has had sex with many guys an alpha female?

Physically, I believe it is something to do with the way semen inserted into a vagina never leaves her body. Sex seems to have a larger impact on women than men from a chemical standpoint, and there seems to be some kind of 'attachment limit' that woman have. As in, after multiple partners they find themselves less able to 'love' a man.

It's a very interesting subject, people do not consider the connection between biological imperatives and mind states enough anymore. Old traditions were developed specifically to work with the mental attitudes developed by biology, the new traditions appear to deny biology can have an impact. The most interesting thing to watch for is whether this cultural denial will be self-fulfilling, as in within a generation or so women will be less biologically-reactive to sex as their biology changes to suit culture.

That is very possible, there is a lot about human development that does seem to relate to culture, I recommend looking into it.