How about some boku no pico? - Anonymous
Boku no Pico is entry-level as far as odd hentai goes.
50% of the content here is user-submitted, and another 25% is found without the original source (i.e., just the image in question). So even if I were to add the sources for the 25% of the posts where I DO know the source, people would whinge anyway. Reverse image search is your friend.