m8,
firstly the sphincter is th muscle that contracts so u dont shit urself. u clearly have no such muscle in your body.
secondly the urethra is up the penis hole.
therefore u r ignorant. fib off. u know nothing captain donkey. y the **** r u proud u stupid bruised testicle. you lack girth and guile and any kind of class. u r a silly little man whom no one really gives a flying **** about who thinks he is sexually arousing to everyone on the surface of the earth. m8, ur arousing to ****ing cats. not to humans. sorry for u being such a defocation upon this earth
tart