Why is motherhood worshipped but sexuality demonized?

A deep trend I observe in society is:
Maternal instinct is deified —while— Sexual instinct is demonized.
Are they not the 2 sides of the same coin?
Ultimately isn’t the sexual instinct prior to the maternal instinct itself?
How would the children even happen without sex?
The mother’s urge to play and protect the child, is it not the same as the male’s urge to protect and play with the opposite-sex?
Why is the sexual instinct and mothering instinct treated like they belong to 2 different levels of reality?
Aren’t both of them part of the same nature?
And it is totally prevalent across the entire animal kingdom.
What gives the mothering instinct is also driven by hormones only, just as all of sex-instinct too is driven by hormones.
Why is the mothering instinct elevated to a different level of reality?
It is considered a blasphemy even to think about it.
This is a vast topic, but just wanted to share this as food for thought.