No, “Manga Head” is not a uniquely Japanese version of oral sex. It’s a new styling gel from Garnier that allows you to create hairstyles just like your favorite anime or manga characters have.
The sad part is that I would’ve jumped at the chance to use a product like this back when I was younger and wasn’t shaving my head on a regular basis, which just shows you the sort of bad taste I have in fashion. I was once really into anime and manga until I got married and Courtney came to live with me and I couldn’t afford to buy it anymore, but back when I had disposable income I would’ve killed for something that would give me anime-style hair.
Still, my daughter has picked up on my former obsession so there may yet be a Jenkins who ends up looking like a Warner Bros. cartoon character that just had dynamite go off next to her head.