My Sleeky Black Sun.

I've never had problems with my ego      
id or superego and stuff like that,      
mainly coz I'd not heard of 'em, ergo      
no probs but, I have had trouble with cats.      
     
To wit my black cat, a scamp, Morpheus      
who ran up a tree and from tree jumped, to roof,      
and sat there grinning faintly like Cepheus      
that high and mighty cat then, so aloof...   
   
That's my entry, " Pick n' Mix poetry "      
a competition pitched by Northern_Soul,      
but something else I'd not heard of, gets me      
that's their " abstract nouns " what the...is their role?      
     
Well, Morph took a longer leap, heaven bound,      
But I still hear him, in that tree, rustling round.

The three words, ego, black, cat.