Dominance-submission has the elements of obedience, surrender, service, discipline, demeanor, punishment and mind-fucking.

BDSM induces altered states of consciousness known as sub-space and top-space

Understanding consent is key to prevent sexual abuse and rape.

Sadism is the consensual infliction of physical or emotional pain while cruelty is to make people suffer for an ulterior goal.

Choking during sex can produce brain damage from neuronal death from anoxia, reperfusion injury, and changes in heartbeat.

Asphyxia during sex can be done using an air choke or a blood choke, which block air entry or the blood supply to the brain, respectively.

Death by autoerotic asphyxiation is less common that thought. Still, choking is the most deathly BDSM activity.

Several surveys show that college students increasingly practice choking during sex

Porn is not addictive. It induces short increases of dopamine and not the sustained ones produced by cocaine and opioids.

Women with spinal cord transections experience vaginal orgasms with sensations carried by the vagus nerve.

Dominance-submission frees ourselves from the psychological pressure of pride and shame.

Mind-fucking in BDSM presents unique challenges to avoid breaking consent, trauma, and inducing learned helplessness.

In BDSM, mind-fucking are mental games that produce defeat and surrender in the submissive.

A list of responsibilities of the dominant and the submissive that derive from the ‘safe, sane and consensual’ rules of ethical BDSM.

A survey of sadists reveals that they inflict pain to achieve pleasure, connection and intimacy.

Radical feminism and sex-positive feminism has been battling for 50 years.

Masochist pain activates brain areas involved in empathy, emotion and consciousness, but not in addiction.

Masochists enjoy pain by itself and to achieve sub space, focus, catharsis, empowerment, orgasms, vulnerability and intimacy.

Fire play in BDSM consists of setting the skin briefly on fire, or touching it with a flame.