I would think it would be annoying. I mean, I don't think my dog likes her tail much. She'll accidentally hit things with it and sometimes knock stuff down when she gets excited. She will always look annoyed about it.
And then I'm sure that it would be yet another thing that can be injured. That would be annoying.
Basically, I'm glad humans normally don't have tails.
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Zachnorn - <D http://img841.imageshack.us/img841/4503/qrcode857546.th.png