I went into this movie desperately hoping they'd fuck, but left desperately wishing they hadn't. Not because of the look of Fishman - I totally buy him and his fish dick. It's his personality and apparent lack of emotional maturity. He's like ET or Air Bud or Iron Giant or Pete's Dragon or a gremlin or Johnny 5 or Mac & Me or any other number of adoptive things - convincing and adorable, but you don't want to fuck them. He's…