Having sex with girls reduces their value or Having sex with girls doesn't reduce their value

Classic RedPill thought states that girls who have sex with lots of men have lower value as a long term mate.

That got me wondering then, is having sex with girls immoral?

The instant response is no, because women can choose, and they're choosing an action which hurts themselves.

BUT, the Red Pill also states that women's mating instincts are programmed and can be manipulated.

What are your ideas on this? It just seems there's no strong argument that sleeping with lots of girls and redpill knowledge is moral.