Yaoi hentai is how gay cartoon porn is called in Japan, it's how they call the 'boy on boy' love. Gay hentai porn videos are mostly searched for in countries like USA, Germany and United Kingdom, but in the last years they saw an increase in other countries like Philippines (guess the ladyboys have something to do with that) and Brazil.
According to some sources, gay porn industry was in recession in 2015 but seems that thanks to gay cartoon porn it is now back in top searches worldwide. The production of gay pornography saw a rise in during the '70's when a number of movie companies released their productions into movie theaters, where sexual intercourse was also permitted according to Wikipedia. Gay cartoon porn or gay hentai represents the sexual activity between males and in this case between cartoon characters.