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

Figging is inserting ginger in the anus or the vagina to produce a burning erotic sensation

Sex is not only for procreation, as shown by the enigmas of sex

Viagra and other phosphodiesterase 5 inhibitors are unfairly criticized despite their efficacy to treat erectile dysfunction

Red flags for abuse in BDSM.

Understanding consent is key to prevent sexual abuse and rape.

Advice on what to do if a person choked during sex of BDSM is unconscious or does not have a pulse.

Scientific studies show that women who are choked have more psychological problems and changes in brain connectivity.

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.

The myth of sexual purity creates the cliché of prostitution as an indelible stain that soils women.

Women engage in prostitution to pay for college, escaping abuse, supporting their children, living richly and sexual exploration.

The stereotypes of the pimp and the Madam are used to accuse prostitutes of proxenetism when they try to run their business

Sex workers do not want to be rescued through marriage or exploitative jobs.

Customers of prostitution (johns) are sexually frustrated men who cannot find partners because of low income, age or disability.

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