Everything in nature reveals some attribute of God, from how plants grow, to sex, to the stars in the sky, to how clouds form, how wind blows, etc.
There are many scriptures, but here are a few:
Romans 1:20 (KJV 1900)
For the invisible things of him from the creation of the world are
clearly seen, being understood by the things that are made, even his
eternal power and Godhead; so that they are without excuse:
Psalm 19:1–5 (KJV 1900)
The heavens declare the glory of God;
And the firmament sheweth his handywork.
Day unto day uttereth speech,
And night unto night sheweth knowledge.
There is no speech nor language,
Where their voice is not heard.
Their line is gone out through all the earth,
And their words to the end of the world.
In them hath he set a tabernacle for the sun,
Which is as a bridegroom coming out of his chamber,
And rejoiceth as a strong man to run a race.
Psalm 19 declares that the heavens "speak", declaring God's glory, and this speech can be heard in every language, in every part of the world. Thus the speech is not a human language, but the language of creation that is understood, according to the Psalmist, by everyone in the world.
When we specifically talk of sex, we mean the union of husband and wife, and Paul says this reveals the nature of the relationship between the church and Christ:
For no one ever hated his own flesh, but nourishes and cherishes it,
just as the Lord does the church. For we are members of His body,
of His flesh and of His bones. “For this reason a man shall leave
his father and mother and be joined to his wife, and the two shall
become one flesh.” This is a great mystery, but I speak concerning
Christ and the church. Nevertheless let each one of you in
particular so love his own wife as himself, and let the wife see that
she respects her husband. (Eph 5.29-33)
We also see in the Old Testament God referring to Israel as his bride, and when she was idolatrous this was like running after other men - thus the unfaithful bride. That is a common theme in many prophecies. We see attributes of God revealed in emotions between couples as well -- e.g. God is a jealous husband and wants Israel to remain faithful.
If you want even finer resolution, at the level of sperm and egg cells, then in Genesis 3.15, God says "And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel."
Thus there was a promised "seed" that would reconcile man to God in order to bridge the fall, and this seed was promised to Abraham and the other patriarchs, and then to David. E.g. to Abraham:
And in thy seed shall all the nations of the earth be blessed; because
thou hast obeyed my voice. Gen 22.18.
In both Gen 3.15 and Gen 22.18, the word translated as "seed" is zera - זֶ֫רַע - which means exactly what Elizabethan english "seed" or "issue" would mean. E.g. it is sperm and thus also seed as from a plant, and thus also "decendents".
We can see this use of seed in Genesis 38:9
Genesis 38:9 (KJV 1900)
9 And Onan knew that the seed should not be his; and it came to pass,
when he went in unto his brother’s wife, that he spilled it on the
ground, lest that he should give seed to his brother.
From this usage of sperm or issue, also comes all the parables about sowing and planting seeds in Mark, etc. as well as the concept of being born again.
For example in John 12:23-25
And Jesus answered them, saying, The hour is come, that the Son of man
should be glorified. Verily, verily, I say unto you, Except a corn
of wheat fall into the ground and die, it abideth alone: but if it
die, it bringeth forth much fruit. He that loveth his life shall
lose it; and he that hateth his life in this world shall keep it unto
If you think about it, the sperm cell, when it joins the egg, dies. It loses its identity, but it becomes a new creation. So imagine if there was a shy sperm cell that didn't want to join the egg, because it enjoyed swimming around. Then it would "abide alone" and would lose its life. So in the very act of procreation we see some attribute of God's plan revealed.
So yes, in all of creation, especially anything related to human relations, agriculture, the stars, weather such as cloud/rain, animals, all of these reveals God's glory in numerous scriptural metaphors. The Bible is filled with these types of metaphors and parables.