I had to educate a grown man about Rule 34.* He was ... a bit
   shocked: Rule of thumb: If it exists either in the 3D world, in
   fiction, or in the imagination of somebody somewhere, there's a
   person who wants to have sex with it. Don't think it's "just
   men". A quick look at tumblr or deviantArt and the percentage
   that are women is equal. Most "Rule 34" artists seem to be
   teenage girls/young women.. and some of them ("shipping") is
   pretty.. um... yeah. interesting.