The Big ImageBoard (TBIB) - 2015 age difference anal anthro anthro on anthro asgore dreemurr asriel dreemurr (god form) ass up beard blush boss monster (undertale) bovid caprine custapple duo facial hair fangs father (lore) father and child (lore) father and son (lore) from behind position horn incest (lore) larger penetrated long ears male male/male male penetrated male penetrating male penetrating male mammal mature anthro mature male monochrome mounting nude older penetrated overweight parent (lore) parent and child (lore) parent and son (lore) penetration royalty sex size difference small dom big sub son (lore) son penetrating father star teeth thick thighs undertale undertale (series)