they say after u circumcize.... your sex life will go downhill and u no longer able to satisfy "her" anymore (much actually)

She is actually partly right.. the foreskin is there to help produce a "gliding sensation" .. something that's gone permanently once you circumcise.

For hygiene purposes.. can't you just spend some time washing it once in a while? 

Just because you have to wash your hair doesn't mean you shave it all off right?