The Big ImageBoard (TBIB) - 3 toes abdominal bulge age difference anal anal penetration anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro anus areola asriel dreemurr ball size difference balls big balls big breasts big penis blush bodily fluids boss monster (undertale) bovid breast smother breasts caprine clothing comic crossgender dialogue drooling duo english text eyes closed feet from behind position fti crossgender fuf gaping gaping anus genital fluids genitals gynomorph gynomorph/male gynomorph penetrating gynomorph penetrating male heart symbol hi res horn huge balls huge breasts huge penis humanoid genitalia humanoid penis incest (lore) intersex intersex/male intersex penetrating intersex penetrating male larger gynomorph larger intersex legwear long ears looking pleasured lying male male penetrated mammal mature anthro mature gynomorph mature intersex moan mother (lore) mother and child (lore) mother and son (lore) mother penetrating son nipples older gynomorph older intersex on back open mouth parent (lore) parent and child (lore) parent and son (lore) pattern clothing pattern legwear penetration penile penile penetration penis penis size difference precum saliva sex size difference smaller male smaller penetrated smothering son (lore) striped clothing striped legwear stripes text toes tongue tongue out toriel undertale undertale (series) young young anthro younger male