Be fruitful and multiply is right there in the first few passages in thr Bible.

So men are supposed to be fruitful and even more importantly, to multiply

Monogamy is addition. 1 + 1. One man l, one woman

But you see polygamy is multiplication one man x 4 women etc.

So ladies, be honest

Exodus 21:10 . 10 If he takes an additional wife, he must not reduce the food, clothing, or marital rights of the first wife. 10 If he takes another wife to himself, he shall not diminish her food, her clothing, or her marital rights.

So the context " Be fruitful and multiple" only applies to procreation alone abi ?
Try to read with understanding.
Only the Holy Spirit can give you Biblical understanding.

Arabs are not looking for biblical evidence to justify their cultural practices.
Chinese are not looking for biblical evidence to justify their cultural practices.
Indians are not looking for biblical evidence to justify their cultural practices.
Japanese are not looking for biblical evidence to justify their cultural practices.
Tais are not looking for biblical evidence to justify their cultural practices.
...


Why do Africans want to justify their cultural practices with biblical evidence? It is a clear manifestation of our alienation. Let us not continue on that degrading path. Instead, let's embrace our culture and our traditions passed down by our ancestors.