Boy-o-boy, I could write a (lavishly illustrated) article on shunga using nothing but what I've got on my hard drive right now. This is MY kind of art history, speaking as a fine arts major. I don't collect the modern stuff, but there is almost nothing in the modern stuff that isn't prefigured in the ukiyo-e.

I saw an exhibit years ago at... I want to say the Legion of Honor in San Francisco... of "shocking" ukiyo-e. Exposed and interlocking genitalia? Tentacles? Pfff. Without the least exaggeration, we're talking hardcore bondage/torture/snuff, in beautifully crafted multicolor woodblock printing. Funny how persistent some of those cultural tropes can be...