Life is senseless, useless. And because there is a high probability that dying will mean agony, it would be better to be already dead. Cognition can only take us this far.
But even though we know that being dead would be preferable, and even though we can try to avoid dying in a terrible way, the human dilemma is that most of us cannot just commit suicide. It goes so strongly against what our genes have programmed us for. Attempts to commit suicide usually do not succeed. Often enough, they are reversed at the last moment.
Humans typically think that they are the pinnacle of evolution. But most probably, we are just one of the numerous models that are discarded after some time by self-replicating molecules for being suboptimal. This is because self-awareness gets in the way of self-replication.
So what to do?
One option would be drugs, preferably opiates. At least we feel good, in spite of all that senselessness. And death from opiates would be a predictably comfortable exit.
The other option is optimal sex. That also feels good. It can even feel fantastic, and, like opiates and pipe dreams, optimal sex can make us forget that all is senseless. And we can definitely prepare for a comfortable death.
Most of my writing is about the subordinate aspects of arranging optimal sex. The senselessness of existence is a higher-ranking topic, but it is covered in just a limited number of sentences.
Pursuing drugs and pursuing sex are topics on the same level, but drugs, much like the senselessness of our existence, do not warrant that much detailed attention.
But when I write about pursuing optimal sex, great detail is relevant: how society provides a cultural frame in which we seek optimal sex, and how it impacts us; and how we can modulate our organisms so that they are primed for optimal sexual function and experience.