
By Popular Demand:
Sooooo I normally go for the less out-there stuff, but I do read a lot of manga so here I find them in my travels (and I hope you enjoy them!)
Some of these are in anthologies so the links below should bring you to that particular chapter if there is one. Feel free to read the other chapters of you wish, though not all of them are anthropomorphic (:
(WARNING: some the manga, but esp the Bee/Hornet creature one may include rape, or dubious consent, which not my cup of tea, but it IS a bee/anthropomorphic yaoi).
These are unusual ones; you have been warned!
Bee/Hornet Creature/Insects (*cringe*) (Aka "Bee Dick")
http://www.mangago.zone/read-manga/bakemono_bl/mf/c006/
Merman Guy (aka "Fish Dick")
http://www.mangago.zone/read-manga/bakemono_bl/mf/c003/4/
Tentacles/Fish creatures of the sea ("Fish/Sea Animal Dick[s?]")
http://www.mangago.zone/read-manga/mermaid_and_the_magician/
Slime creature ("Liquid/Slime Dick")
http://www.mangago.zone/read-manga/maou_uke_bl/uu/maou_uke_bl-chapter-2
Spider Creature/Anthropomorphic (aka "Spider-Man-Creature Dick")
http://www.mangago.zone/read-manga/bouzu_to_kumo_buddhist_priest_spider/
(Her other works also have other unusual anthropomorphic themes, and have more romance than the other ones on this list).
One Shot/Short with Flower plant that comes to life (aka "Flower Dick"):
http://www.mangago.zone/read-manga/hara_peko_mitsuba_chinko/
http://www.mangago.zone/read-manga/hara_peko_mitsuba_chinko/
like i said, just count on yaoi to give you weird ass sex. nothing is too ridiculous when it comes to yaoi. you want liquid dick? done. you want fish dick? done. you want bees dick? done. you want groot dick? done, oh you wanted the leaves? done.