One of the lesser-known Japanese idiosyncrasies is their widespread fascination with little anime / hentai plastic dolls. When I was in Tokyo (a couple of years ago now), I witnessed this in action. Middle aged men going into a specialist store and drooling over these 10cm dolls with a strange look in their eyes (in the eyes of the men, not the dolls).
I honestly can’t tell you what they do with them. Just put them on top of their PlayStations I’m hoping?