Someone, please explain to me these poem lines (DETAILED)
'And when I go to dancing-class on Saturdays at three,
I find the First Position very difficult for me.
Though I put my best foot foremost, and good time I try to keep,
To my chagrin, I often find a foot or two asleep.
Athletics I attempted, but, alas! I must admit
That every exercise I tried I put my foot in it.
I think I'll join a foot-ball team,--as many friends suggest,--
Before I've one foot in the grave and gout in all the rest.
But now I'll say good-morning; for, my friend, I have to stop
To get my boots blacked neatly at this little boot-black's shop;
And, as you may imagine, it will keep me here some time,
But, what is worse, I'll have to pay him many a hard-earned dime.'
The centipede want to polish his shoes but it will take some time and he will have to pay for making the shoes back
And as he went he murmured, in a thoughtful undertone:
'I'm a happy little Spider, and I'm very glad indeed,
That I was born an octoped and not a centipede!'