The Bible has an amazing array of information about this subject that is both covered with piety and shame yet invokes titillating emotions ranging from mild to worse-than-animal instincts in us human-kind.
As a child it was just whispered and I had to learn of it from my peer groups. So on the one side it was covered in shame, the other in a devilish interest.
When searching the Scriptures one get to a very frank and open discussion of this subject, and sometimes it borders on what one would consider "soft porn" at least - bar the use of euphmisms.
This entails some of the strongest emotions and physical experiences of our human existence, but it is like fire - when used within very specific confines it is good and beneficial, aiding in man-wife relations and contribute to our humans to continued existence.
This section contains what I could find on the subject - and that is mostly negative - unfortunately.
But is understandable, the Genesis 6 incident - for those who follow the "father" in saying it was the Sethites, you have NO grounds whatsoever - where the sons of YHWH (Benei HaʼElōhīm) had children with human women, sex was tainted forever.
We not only have to deal with our own emotions, needs, desires, sinful neighings, but there is an array of spiritual oversexed beings that are too willing in being part of activities that are warned against and judged by YHWH in the strongest of terms.
Many, many people, believing people, are going to be surprised to find out how seriously this viewed through YHWH's lenses - at the great judgment day.
And this was not only in the Old Covenant times that this was frowned upon, judged and punished - the wanings and judgements were carried over into the New Testament.
Jesus warned, Paul, Peter, James - all of them in the strongest possible terms.
Having some knowledge of the mystery religions, and the very prominent role that debased sex play in there rituals, one is advised to get as much as possible information to be armed to the teeth not to fall into the traps of a viciously powerful, intelligent and devious enemy's traps.
The amount of sex symbols in the Afrikaner tradition is staggering, with phalus and woman-demon intercourse displayed openly - visible when your eyes are opened. And nowadays, the ultimate, intercourse between man and spirit-god symbology is shown in the most arrogant and challenging ways.
It is advised that parents introduce their children at a resonable age of course, and with tons of wisdom, to the place and use of sexual relations. BUT, the negative is also important. Just as one need not once to teach a child to lie, to throw an tantrum, or exhibit some very naughty behaviour, so the depraved human mind has no guidance needed to introduce some deviant behaviour in the mind and body of a child. On top of that, we are living in a sex saturated world, and a child WILL be exposed to some forms of these deviant behaviours.
Forwarned is forarmed.