what does section 27 means in song of myself

27

To be in any form, what is that?
(Round and round we go, all of us, and ever come back thither,)
If nothing lay more develop’d the quahaug in its callous shell were enough.

Mine is no callous shell,
I have instant conductors all over me whether I pass or stop,
They seize every object and lead it harmlessly through me.

I merely stir, press, feel with my fingers, and am happy,
To touch my person to some one else’s is about as much as I can stand.

The entire poem is a celebration of being alive and human. This section deals with that by comparing it to being a quahung, and how he prefers human. He expands upon the softness and sensitivity of the human form, and two of them in contact, to expound upon his joy.