The Big ImageBoard (TBIB) - 2015 age difference anal anal penetration anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro asgore dreemurr asriel dreemurr beard blonde hair boss monster (undertale) bovid caprine custapple duo erection facial hair fangs father (lore) father and child (lore) father and son (lore) foreskin genitals goat hair horn humanoid genitalia humanoid penis incest (lore) larger male larger penetrated long ears male male/male male penetrated male penetrating male penetrating male mammal mature male monochrome muscular nude older male older penetrated parent (lore) parent and child (lore) parent and son (lore) partially retracted foreskin penetration penile penile penetration penis royalty sex size difference small dom big sub smaller male son (lore) son penetrating father teeth thick thighs undertale undertale (series) younger male