I'm only a man with a fully wet sheen.

Also:

I'm only a man in a frilly wet sheet.

And:

I'm only a man in a fully-wrapped sheet.

The story:

It changed for me from time to time, and it's so hard to hear the singer because he doesn't pronouce the words right! And I only realized it now, when I was reading about this song! I STILL cannot hear the right lyrics no matter how hard I try!