2_penisesabsanimal_genitaliaanimal_penisanusapodeballsbicepsdeal_with_itdraconcopodeequidequineequine_genitaliaequine_peniserectioneyeweargenitalshorsehybridlamialeglesslion21malemammalmulti_genitaliamulti_penismuscularmuscular_malepecspenisrecliningreptilesandscalieserpentinesnakesolosplit_formsunglassesveinwhat_has_science_done