What's the difference between an Elephant and a Post Box?!

What's the difference between an Elephant and a Post Box?

Give up? Well it wouldn't be much use sending you to post a letter.
(on a more serious note, if I ever do want to send off a letter and I ask you to do it for me, please don't try to post it in an Elephant)

1 week ago
dark raven, I guess you're right, thinking about it it would be hard to get them confused

1 week ago
Sweet Polly Purebrea…etc, yes I get it, ex-fed

Uh the elephant has a trunk and the post box, the rural ones,. has got a flag. Plus it stands still and won't try to eat your mail. See now we know why never to post it in an elephant; I just told you why.