If it makes you feel any better, silk is still the preferred standard for smoothness, and even baby bottoms are slightly more smooth than butter: https://trend

If it makes you feel any better, silk is still the preferred standard for smoothness, and even baby bottoms are slightly more smooth than butter: https://trends.google.la/trends/explore?date=today%205-y&q=smooth%20as%20butter,smooth%20as%20silk https://trends.google.la/trends/explore?date=today%205-y&q=s... https://books.google.com/ngrams/graph?content=smooth+as+butter%2Csmooth+as+a+baby%2C+smooth+as+silk&case_insensitive=on&year_start=1990&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t4%3B%2Csmooth%20as%20butter%3B%2Cc0%3B%2Cs0%3B%3Bsmooth%20as%20butter%3B%2Cc0%3B%3BSmooth%20as%20butter%3B%2Cc0%3B.t4%3B%2Csmooth%20as%20a%20baby%3B%2Cc0%3B%2Cs0%3B%3Bsmooth%20as%20a%20baby%3B%2Cc0%3B%3BSmooth%20as%20a%20baby%3B%2Cc0%3B.t4%3B%2Csmooth%20as%20silk%3B%2Cc0%3B%2Cs0%3B%3Bsmooth%20as%20silk%3B%2Cc0%3B%3BSmooth%20as%20silk%3B%2Cc0%3B%3BSmooth%20as%20Silk%3B%2Cc0 https://books.google.com/ngrams/graph?content=smooth+as+butt...