The Big ImageBoard (TBIB) - anon anthro anthro penetrated avian bird duo eyes closed faceless character faceless human faceless male feet female female on human female penetrated fours (artist) from front position hirundinid human human on anthro human penetrating human penetrating anthro interspecies larger human larger male lying male male/female male on anthro male penetrating male penetrating female mammal on back oscine passerine penetration penile penile penetration penis in pussy rough sex sega sex simple background size difference smaller anthro smaller female smaller penetrated sonic riders sonic the hedgehog (series) standing swallow (bird) talons toes vaginal vaginal penetration wave the swallow white background