If you are looking for clear parallels between us and our ancient forbearers, then you can always find a solid connection with our mutual attraction to sexual desires and old and new ingenious solutions for enhancing intimate relations with one another.
Olive oil was the first recorded mention of a substance being used as a lubricant, by the ingenuous ancient Greeks in 350BC. They instinctively knew that lubrications adds to sexual pleasure. Ancient Chinese people used Seaweed and even Yams somehow got in on the act.
Thankfully these days, lubrication in the bedroom is much easier. We have healthy and long-lasting lubricants that might not be able to do much for your salads, but they will give you all the lubrication you need to keep your sex life smooth and satisfying.