A laugh so horrible that no one could believe had come from human lips.

If the words had come from human lips, he would have given them no credence.

Then, from those human lips came the scraps of a voice.

Words came from the man at the door - words that seemed uttered by no human lips.

Then came an outcry which seemed to rise in unison from all human lips present.

But human lips had shaped them, he was sure of that.

Yet it must have learned them from human lips.

He spoke a spell of death with his human lips.

However, when the red shows on the surface it is often due to selection, as in human red lips.

Watching that growl trickle from between his human lips raised the hair on the back of my neck.