In Reply to: Soft soap posted by Dave Ridgeyard on February 16, 2009 at 20:01:
: Do you know the origin of the phrase "to soft soap"?
At http://www.answers.com/topic/soft-soap they have:
This colloquial expression alludes to liquid soap, likening its slippery quality to insincere flattery. Its figurative use was first recorded in 1830.