That's technically double penetration, not just a threesome(;
Oh
dont think thats even possible though.. lol yaoi stuff are mostly like far far away from the reality but minami haruka's are top of it and this piece is on top of all i guess
Human centipede
Double anal is entirely possible, though I have seen the damage that can be done when it is done violently and/or without the proper preparation. I've also been involved in orgies where DV/DA was performed (double vaginal/double anal), though not to me. Google "double anal" and you'll find plenty of porn examples. Just don't try this at home kids. The people doing it in porn are pros. They have had lots of preparation and lots of practice. DA is NOT something you do on a whim with your first boyfriend.
So thats a threesome ...... interesting (0-0)