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 barefoot beard black and white blush boss monster (undertale) bovid caprine custapple duo erection facial hair fangs father (lore) father and child (lore) father and son (lore) feet foreskin genitals goat horn humanoid genitalia humanoid penis incest (lore) intraspecies larger penetrated long ears male male/male male penetrated male penetrating male penetrating male mammal monochrome muscular nude older penetrated parent (lore) parent and child (lore) parent and son (lore) penetration penile penile penetration penis retracted foreskin royalty sex size difference small dom big sub son (lore) son penetrating father teeth thick thighs undertale undertale (series)