analanal_penetrationareye_(artist)arthropodarthropod_abdomenartist_collaborationbacksackball_size_differenceballsbeetlebig_ballsbig_buttbig_penisbioluminescenceblack_barsbuttbutt_grabdominantduoelateroidfemboyfireflyfluffedwingsgenitalsglowingglowing_bodyglowing_butthand_on_butthi_reshuge_butthuge_penishumanoid_genitaliahumanoid_penisinsectlarger_domlepidopteranletterboxlionel_(fluffedwings)lum_(areye)malemale/malemothmuscularmuscular_malepenetrationpenilepenile_penetrationpenispenis_in_asspresentingpresenting_hindquarterssexsize_differencesmall_penissmaller_malesolo_focusspread_buttspreadingthick_thighsveinveiny_ballsveiny_peniswide_hips