Playin a Song that I've forgotten (as usual) its Name

Haha, I'm playing a song called hmmmm..... I forget the name already, haha... the original one is much much better as compared to mine, lousy one.  I couldnt master all d tabs; I am merely a beginner, just learnt the easy plucking parts, as usual. I skipped those "only can be played by pro guitarists" parts (haha, this sentence sounds German)...I learnt this years ago, keep playing but forget d song name, as usual, ahah.......

ideal and real

ideal=Everything is perfect. many things are

ignored. 

real= Everything is not perfect; errors do occur.

  Errors cannot be totally avoided, but can  be minimized. Repetition of trials under same circumstance leads to minimal errors, provided appropriate methods. 

physics is ideal, engineering is real.

communism is ideal, authoritharian is real.

love is???