Dylan o'brien

My native language is not english and I'm just blown away this style is called a pornstache, is there a specific reason?

it was common for pornstars in like the 70s to have this type of mustache, so it got labelled that

In Deutschland kenne ich ihn auch unter "Schenkelbürste". 😅
***
In Germany I also know it as the "thigh brush". 😅