There's no such thing as a good looking human cock.
How do you know, have you looked at all of them? Maybe there's one out there that's so beautiful you couldn't stop yourself from blowing it.
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It's a comparison thing. Sorta like how once you've had cable internet you never ever ever want to go back to dialup for anything. You can argue all day "Maybe there's a dialup ISP so good you'll get them over cable!", but it's not a question of a specific dialup ISP over another dialup ISP that keeps me away from dialup. I now know of something far better in concept and there's just plain no going back. I mean, maybe, if I need to, but the whole time I'll be thinking "Man I wish this was cable, man I wish this was cable, man I wish this was cable."
You just can't beat the smooth, simple, elegant curves of a dolphin cock. Human cocks will never be a match. Even the ugliest of dolphin cocks is far more good looking than any human cock I've ever seen.