Rule 34 Dev - 1boy 2020s 2022 alternate_universe animated_skeleton artist_name black_dildo cum cumming dildo ectopenis ectoplasm exposed gay heart heki_(artist) heterochromia male male_only masturbation object_insertion sans sans_au sans_oc sex_toy skeleton solo two_tone_penis undertale undertale_(series) undertale_au|6984504248