ASMR porn refers to porn that includes an element of autonomous sensory meridian response, a pleasurable sensation described as "brain tingling" or a "brain-gasm" that's typically triggered by gentle sounds such as whispers, crackles, popping, tapping, some types of music and even personal attention - or the sensation of it.
In ASMR porn, erotic content is combined with some elements of typical ASMR tracks or video, including soft whispering and, most commonly, roleplay and JOI, or jerk-off instructions. It also centers around sounds such as licking, sucking and stroking.
According to Pornhub Insights, searches related to ASMR porn have continued to grow year over year since 2016.
Scientific research around ASMR is still limited, but a 2018 study found evidence that ASMR did promote pleasant feelings and reduced unpleasant ones. According to The Origin Theory of ASMR, ASMR can cause the release of chemicals such as serotonin, oxytocin and dopamine, the same chemicals released during sexual arousal.