So, what is the meaning behind dig? Can't figure a sane reason for that to be perverted.

FWP said:

So, what is the meaning behind dig? Can't figure a sane reason for that to be perverted.

It's a euphemism for sodomy in Japanese.

JuanValdezJr said:

It's a euphemism for sodomy in Japanese.

Same word that got (mis)translated as CAVED.