He's wrong. Technologically aided self-stimulation, both electric (vibratory) and synthetic (plastics!) are 20th century innovations with no, as far as I know, pre-modern counterparts.
Really? Would vegetables and minerals count as "technology?" Surely folks have been using those forever. No beautiful jade dildos in history's annals, or what?
No beautiful jade dildoes that vibrate.
What about bukkake?
Not to mention sex in airplanes, sex while scuba diving, sex on acid, cybersex . . .
From what I know of bukkake, it's supposedly based on an ancient Japanese tradition for punishing adulterous women. Maybe that's an old wives' tale.
The Wikipedia thinks otherwise, but it's been wrong before. (Hurry! That page is apparently going to be deleted!)
Actually, most of the votes on the Wikipedia deletion page are "Keep" so it's a fair bet that the article on bukkake will stay.